LaTeX and other markup!

For the discussion of math. Duh.

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bosecondensate
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Re: LaTeX and other markup!

Postby bosecondensate » Tue Apr 13, 2010 12:38 am UTC

Testing support for xypic
[math]\xymatrix{T\times V\ar[r]^p\ar[dr]_i&T\otimes V\ar[d]^h\\&W[/math]

dotproduct
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Re: LaTeX and other markup!

Postby dotproduct » Mon May 03, 2010 11:34 pm UTC

It's not showing up right in preview, so I'll check if that's just the preview or if it's really not working.

<imath>\Delta^1_2</imath>

Ended
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Re: LaTeX and other markup!

Postby Ended » Mon May 03, 2010 11:43 pm UTC

dotproduct wrote:It's not showing up right in preview, so I'll check if that's just the preview or if it's really not working.

<imath>\Delta^1_2</imath>

You need square brackets:

Code: Select all

[imath]\Delta^1_2[/imath]
[imath]\Delta^1_2[/imath]
Generally I try to make myself do things I instinctively avoid, in case they are awesome.
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__Jonny
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Re: LaTeX and other markup!

Postby __Jonny » Sat May 29, 2010 9:56 pm UTC

[imath]1+1=2[/imath]

...
:D

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Dason
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Re: LaTeX and other markup!

Postby Dason » Sat May 29, 2010 10:36 pm UTC

__Jonny wrote:[imath]1+1=2[/imath]

...
:D


Note: Please don't use imath for something like this in any other thread. That is all. Carry on.
double epsilon = -.0000001;

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Eastwinn
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Re: LaTeX and other markup!

Postby Eastwinn » Tue Jun 15, 2010 10:09 pm UTC

This site is a huge time saver: http://www.codecogs.com/latex/eqneditor.php .
http://aselliedraws.tumblr.com/ - surreal sketches and characters.

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IllvilJa
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Re: LaTeX and other markup!

Postby IllvilJa » Wed Jun 16, 2010 8:10 am UTC

Aah... mathematics typeset by LaTeX is pure poetry... Wonderful thread, wonderful feature.

[math]\left\langle p,l,s,v \mid (pl)^{5},(ps)^{2},(pv)^{2},(ls)^{3},(lv)^{2},(sv)^{3}\right\rangle[/math]

A cookie to anyone who can tell what the above formula describes :). Hope I got all the exponents right though.

(Yes, the formula actually means something and odd enough, something I'm particularly interested in. Yes, I'm a nerd beyond any help...)

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jestingrabbit
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Re: LaTeX and other markup!

Postby jestingrabbit » Wed Jun 16, 2010 10:46 am UTC

Is it the monster?
ameretrifle wrote:Magic space feudalism is therefore a viable idea.

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IllvilJa
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Re: LaTeX and other markup!

Postby IllvilJa » Wed Jun 16, 2010 10:04 pm UTC

Actually it is! To be more specific, it is the Coxeter group describing this monster.

(As said, I might have gotten some of the exponents in the formula wrong, I did not find the specific formula for that polytope anywhere)

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jestingrabbit
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Re: LaTeX and other markup!

Postby jestingrabbit » Thu Jun 17, 2010 12:20 am UTC

So its not the monster.
ameretrifle wrote:Magic space feudalism is therefore a viable idea.

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PM 2Ring
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Re: LaTeX and other markup!

Postby PM 2Ring » Thu Jun 17, 2010 7:41 am UTC

IllvilJa wrote:Actually it is! To be more specific, it is the Coxeter group describing this monster.

Coxeter was one of the greatest geometers of all time.
John Baez wrote:The University of Toronto is an urban campus, rather grey and chilly at this time of year. Nestled amid other buildings at the southern edge of campus, the Fields Institute doesn't stand out.

But inside, you'll find a spacious and peaceful atrium, with a fireplace to keep you cozy. A spiral staircase winds up three or four stories. Hanging from the ceiling far above is a 3d model of the "120-cell": a beautiful 4-dimensional solid with 120 regular dodecahedra as faces.

This is a tribute to the great geometer H. S. M. Coxeter, master of polyhedra, who worked for 60 years at the University of Toronto after studying philosophy at Cambridge under Wittgenstein. You'll also find Coxeter's piano sitting at the base of the spiral staircase.


To get back on topic, I like LaTeX, but the way it's implemented here really slows down page loading, so I try to avoid using it when it's possible to make do with high ascii codes and sub & sup.

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Re: LaTeX and other markup!

Postby joshz » Tue Oct 26, 2010 11:02 pm UTC

antonfire wrote:
Random832 wrote:Blackboard bold (i.e. ℤ Image for the integers) isn't supported (\mathbb just gives ordinary bold) is there any way to add support for that?
This is genuinely broken now. At the time of this writing, "\mathbb{Z}", [imath]\mathbb{Z}[/imath], gives the error "Unknown control sequence '\msbm'".

I can probably install fonts locally to make this go away (can I?), but that would hardly fix the problem of people being unable to read what I write.
This is still broken. Are there any plans to fix it? It's a bit of a kludge to go to wikipedia and copy it in (or look up the unicode) each time I want to use blackboard bold Z, R, etc.
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Slonimsky
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Re: LaTeX and other markup!

Postby Slonimsky » Sun Nov 14, 2010 7:40 pm UTC

-Snip-

nevermind, I got it (kinda) fixed

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the tree
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Re: LaTeX and other markup!

Postby the tree » Wed Nov 24, 2010 2:37 pm UTC

Not sure if this the right thread to ask general LaTeX question but if anyone could help me with this, it'd be cool.

In a document I'm writing I have:
Some writing

$ $ god awful equation that is a million billion characters long and makes you want to cry $ $

some more writing
And within the double-dolars, TeX isn't automatically inserting any line breaks at all and the equation is going off of the edge the page. Is there something I can do to encourage TeX to put a line break in an appropriate place? Or should I try to do that manually (how I do that?)?

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jestingrabbit
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Re: LaTeX and other markup!

Postby jestingrabbit » Wed Nov 24, 2010 4:39 pm UTC

the tree wrote:Not sure if this the right thread to ask general LaTeX question but if anyone could help me with this, it'd be cool.

In a document I'm writing I have:
Some writing

$ $ god awful equation that is a million billion characters long and makes you want to cry $ $

some more writing
And within the double-dolars, TeX isn't automatically inserting any line breaks at all and the equation is going off of the edge the page. Is there something I can do to encourage TeX to put a line break in an appropriate place? Or should I try to do that manually (how I do that?)?


You'll need to do it manually. There are a few ways around it. I like to use the align environment, though its kinda deprecated these days. You can do it all with array, or eqnarray, and they're both described pretty well in lshort.pdf.
ameretrifle wrote:Magic space feudalism is therefore a viable idea.

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the tree
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Re: LaTeX and other markup!

Postby the tree » Wed Nov 24, 2010 5:01 pm UTC

Thanks, eqn array managed to do it. (I had to spend a good bit of time staring at it to realise how to make that not ennumerate every line).

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Re: LaTeX and other markup!

Postby gmedina » Fri Dec 03, 2010 2:12 am UTC

jestingrabbit wrote:...I like to use the align environment, though its kinda deprecated these days. You can do it all with array, or eqnarray, and they're both described pretty well in lshort.pdf.


It's the other way around. In a LaTeX document it is advisable not to use eqnarray anymore and to use align (or any other of the environments provided by the amsmath package, for example). The reasons can be found in this article by Lars Madsen: Avoid eqnarray!.

As a side note, in a LaTeX document, the construct $$...$$ shouldn't be used anymore (refer to l2tabu for the reasons); one should use \[...\] instead.
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Rippy
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Re: LaTeX and other markup!

Postby Rippy » Sat Dec 04, 2010 10:00 pm UTC

Just started learning LaTeX today! (eventually I plan to transcribe all my math notes into searchable, pretty digital format).

...Aaaand 3/4 of a page into said notes, I have a question. If I have a matrix with entries involving addition, and I want the plus signs aligned, how would I do so? Using an &, as you would for column alignment, adds some space in addition to aligning.

For example, with no alignment (and a bit of garbage added to make things easier to see):
[math]\begin{bmatrix}
a_{11}x_{1}o_{1}m_{3}f_{3}g_{7} + a_{12}x_{2} + \ldots + a_{1n}x_{n} \\
\vdots \\
a_{m1}x_{1} + a_{m2}x_{2} + \ldots + a_{mn}x{n}
\end{bmatrix}[/math]

With ampersands:
[math]\begin{bmatrix}
a_{11}x_{1}o_{1}m_{3}f_{3}g_{7}& + a_{12}x_{2}& + \ldots + a_{1n}x_{n} \\
&\vdots \\
a_{m1}x_{1}& + a_{m2}x_{2}& + \ldots + a_{mn}x{n}
\end{bmatrix}[/math]

Also, is there a better way to center-align (or something close) those vdots in the 2nd row than by putting an ampersand in front to align them with one of the + signs?

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Talith
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Re: LaTeX and other markup!

Postby Talith » Sat Dec 04, 2010 10:42 pm UTC

How about
[math]\left [ \begin{array}{rcccccl}
a_{11}x_{1}o_{1}m_{3}f_{3}g_{7}& + & a_{12}x_{2} & + & \ldots & + & a_{1n}x_{n} \\
&&&\vdots&&& \\
a_{m1}x_{1}& + & a_{m2}x_{2} & + & \ldots & + & a_{mn}x{n} \end{array}\right ][/math]
(double click the LaTeX to see the code)

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Re: LaTeX and other markup!

Postby gmedina » Sun Dec 05, 2010 4:25 pm UTC

Change \ldots to \cdots in Talith's code.
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Re: LaTeX and other markup!

Postby gmedina » Sun Dec 05, 2010 4:48 pm UTC

To reduce the space between the plus signs, I would change the code to

Code: Select all

\left[
\begin{array}{r@{\,+\,}c@{\,+\,}c@{\,+\,}l}
  a_{11}x_{1}o_{1}m_{3}f_{3}g_{7} & a_{12}x_{2} & \cdots & a_{1n}x_{n} \\
  \multicolumn{4}{c}{\vdots} 
  \\ a_{m1}x_{1}&  a_{m2}x_{2} & \cdots &  a_{mn}x{n}
\end{array}
\right]
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Rippy
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Re: LaTeX and other markup!

Postby Rippy » Wed Dec 15, 2010 1:36 am UTC

Well, I can't say I quite understand all that yet, but it seems to work much more nicely :).

I've written out a few more pages (in between all these exams...), and I'm wondering if someone could have a quick look at the whole .tex file and maybe give some pointers. Stylistically I find the result just looks like everything is mashed together; none of the proofs or theorems get indented so if you, say, try to place a remark inside a theorem, it looks like the theorem ends and a remark begins because there's no indentation. The section/subsection headings are also really small and easy to miss.

I'm using the amsart document class, and I'm assuming I just haven't got the right style template for my needs. (My statistics course notes, which I assume are done in LaTeX, are lousy the same way, except they do have nice substantial headers for each chapter)

Also, is there any particular style to use when writing the LaTeX for long documents? I've gotten into the habit of indenting stuff as a visual aid, but I have no idea if this is common.

Anyway, here's my document; I was going to just upload the file but there are filetype restriction (no .tex, .txt, or my creative .lol apparently), so hopefully this is readable:

Spoiler:

Code: Select all

1 \documentclass{amsart}
  2
  3 \numberwithin{equation}{section}
  4
  5 \newtheorem{theorem}{Theorem}[subsection]
  6 \newtheorem{lemma}[theorem]{Lemma}
  7 \newtheorem{proposition}[theorem]{Proposition}
  8 \newtheorem{corollary}[theorem]{Corollary}
  9 \newenvironment{definition}[1][Definition]{\begin{trivlist}
 10 \item[\hskip \labelsep {\bfseries #1}]}{\end{trivlist}}
 11 \newenvironment{example}[1][Example]{\begin{trivlist}
 12 \item[\hskip \labelsep {\bfseries #1}]}{\end{trivlist}}
 13 \newenvironment{remark}[1][Remark]{\begin{trivlist}
 14 \item[\hskip \labelsep {\bfseries #1}]}{\end{trivlist}}
 15 \addtolength{\parskip}{\baselineskip} %more space between paragraphs
 16 \setlength{\parindent}{0pt}           %no identing of first line of paragraphs
 17
 18 \begin{document}
 19
 20 \title{MATH 235 Course Notes}
 21 \author{John G.}
 22 \date{Fall 2010}
 23
 24 \maketitle
 25 \newpage
 26 \tableofcontents
 27 \newpage
 28
 29 \section{Linear Mappings and Bases}
 30         \subsection{Rank and Columnspace}
 31                 \begin{theorem}
 32                 \label{cspace}
 33                 Let $B$ be the RREF matrix of $A$. Certain columns of $A$ form a basis of $Col(A)$ iff the c    orresponding
 34                 column of $B$ form a basis for $Col(B)$.
 35                 \end{theorem}
 36                 \begin{proof}
 37                         We know that $\vec{x}$ is a solution for $A\vec{x} = \vec{0}$ iff it is a solution f    or $B\vec{x}=\vec{0}.$
 38                         \begin{equation*} \begin{split}
 39                                 A\vec{x} & =
 40                                 \begin{bmatrix}
 41                                         a_{11} & \dotsm & a_{1n} \\
 42                                         \vdots & \ddots & \vdots \\
 43                                         a_{m1} & \dotsm & a_{mn}
 44                                 \end{bmatrix} \\
 45                                 & =
 46                                 \begin{bmatrix}
 47                                         a_{11}x_{1}&+&a_{12}x_{2} + & \ldots + & a_{1n}x{n} \\
 48                                         &&\vdots \\
 49                                         a_{m1}x_{1}&+&a_{m2}x_{2} + & \ldots + & a_{mn}x{n}
 50                                 \end{bmatrix} \\
 51                                 & =
 52                                 \begin{bmatrix} a_{\downarrow1} \end{bmatrix}x_{1} +
 53                                 \begin{bmatrix} a_{\downarrow2} \end{bmatrix}x_{2} + \ldots +
 54                                 \begin{bmatrix} a_{\downarrow{}n} \end{bmatrix}x_{n} \\
 55                                 & = \vec{0}
 56                         \end{split} \end{equation*}
 57                         Similarly,
 58                         \begin{equation*} \begin{split}
 59                                 B\vec{x} =
 60                                 \begin{bmatrix} b_{\downarrow1} \end{bmatrix}x_{1} +
 61                                 \begin{bmatrix} b_{\downarrow2} \end{bmatrix}x_{2} + \ldots +
 62                                 \begin{bmatrix} b_{\downarrow{}n} \end{bmatrix}x_{n}
 63                                 = \vec{0}
 64                         \end{split} \end{equation*}
 65                         Certain columns of $A$ are linearly dependent iff there is a solution $\vec{x} \neq     \vec{0}$.
 66                         The same holds true for $B$.
 67                         Therefore, certain columns of A are linearly (in)dependent iff the corresponding col    umns of B are
 68                         linearly (in)dependent. \\
 69                         We construct a basis using any largest possible linearly independent set.
 70                 \end{proof}
 71
 72                 \begin{remark}
 73                         Way to create/check a basis:
 74                         \begin{enumerate}
 75                                 \item Linearly independent and a spanning set
 76                                 \item Linearly independent and ensure it is a maximal set
 77                         \end{enumerate}
 78                 \end{remark}
 79
 80                 \begin{example}
 81                         \begin{equation*}
 82                                 A =
 83                                 \begin{bmatrix}
 84                                         1 & 2 & 2 & -1 \\
 85                                         3 & 6 & 5 & 0 \\
 86                                         1 & 2 & 1 & 2
 87                                 \end{bmatrix}
 88                                 \rightarrow \ldots \rightarrow
 89                                 \begin{bmatrix}
 90                                         1 & 2 & 0 & 5 \\
 91                                         0 & 0 & 1 & -3 \\
 92                                         0 & 0 & 0 & 0
 93                                 \end{bmatrix}
 94                                 = B
 95                         \end{equation*}
 96                         In matrix $B$, columns 1,3 form a basis for $Col(B)$. \\
 97                         In matrix $A$, columns 1,3 form a basis for $Col(A)$.
 98
 99                         \emph{NOTE:} Columns 1 and 3 of matrix $B$ do NOT form a basis for $Col(A)$.
100                         Row operations do NOT preserve columspace. $Col(A) \neq Col(B)$.
101
102                 \end{example}
103
104                 \begin{corollary}
105                         \label{cor1}
106                         if $B$ is the RREF matrix of $A$ and given the columns of $B$ with leading
107                         1's, the corresponding columns of A form a basis of $Col(A)$.
108                 \end{corollary}
109
110                 \begin{corollary}
111                         \label{cor2}
112                         $dim(Col(A)) = rank(A)$
113                 \end{corollary}
114
115                 \begin{proof}[Proof of \ref{cor1}]
116                         The columns with leading 1's are linearly independent (standard basis vectors)
117                         and all entries below the leading 1's are zero. Thus, the linearly independent
118                         set is maximal $\Rightarrow$ it forms a basis of $Col(B)$. Use the corresponding
119                         columns in $A$ for $Col(A)$.
120                 \end{proof}
121
122                 \begin{proof}[Proof of \ref{cor2}]
123                         \# of leading 1's $=$ maximum \# of linearly independent columns.
124                 \end{proof}
125
126                 \emph{NOTE:} if $A \in M(m,n)$ then $Col(A) = \{ A\vec{x} | \vec{x} \in \mathbb{R}^n\}$.
127
128                 For a linear mapping $L : \mathbb{R}^n \rightarrow \mathbb{R}^m$, the output is given by
129                 $[L]\vec{x}, x \in \mathbb{R}^n$.
130
131                 \begin{theorem}
132                         For a linear mapping $L : \mathbb{R}^n \rightarrow \mathbb{R}^m$,
133                         \begin{equation*}
134                                 dim(Range(L)) = dim(Col(L)) = rank(L)
135                         \end{equation*}
136                 \end{theorem}
137
138                 The rank of a linear mapping has nothing to do with its matrix representation. This gives
139                 a non-matrix meaning for rank.
140
141                 \begin{definition}
142                         The \emph{rank} of a linear mapping $L : \mathbb{R}^n \rightarrow \mathbb{R}^m$
143                         is the dimension of its range.
144                 \end{definition}
145
146                 Rank also has a relationship with the nullspace.
147
148                 \begin{example}
149                         \begin{equation*}
150                         A =
151                                 \begin{bmatrix}
152                                         1 & 2 & 2 & -1 \\
153                                         3 & 6 & 5 & 0 \\
154                                         1 & 2 & 1 & 2
155                                 \end{bmatrix}
156                                 \rightarrow \ldots \rightarrow
157                                 \begin{bmatrix}
158                                         1 & 2 & 0 & 5 \\
159                                         0 & 0 & 1 & -3 \\
160                                         0 & 0 & 0 & 0
161                                 \end{bmatrix}
162                                 = B
163                         \end{equation*}
164                         To find the nullspace of $A$, find the solution of $A\vec{x} = \vec{0} = B\vec{x}$.
165                         The solutions to $A\vec{x} = \vec{0}$ are
166                         \begin{equation*}
167                                 Null(A) = span\{(-5,0,3,1),(-2,1,0,0)\} \\
168                                 dim(Null(A)) = 2
169                         \end{equation*}
170                 \end{example}
171
172         \subsection{Nullity and Rank/Dimension Theorem}
173                 \begin{definition}
174                         The dimension of the nullspace of a linear mapping $L$ is also called the
175                         \emph{nullity} of $L$.
176                 \end{definition}
177
178                 $rank([L])$ measures the dimension of the range of $L$. The nullspace focuses on all
179                 vectors where $[L]\vec{x} = \vec{0}$. If $\vec{x}\in\mathbb{R}^n$ and the dimension of
180                 the range is less than n, some vectors became $\vec{0}$.
181
182                 \begin{theorem}[Rank/Dimension Theorem]
183                         Let $V$ be an n-dimensional vector space.
184
185                         If $L : V \rightarrow W$, then
186                         \begin{equation}
187                                 rank(L) + dim(Null(L)) = n
188                         \end{equation}
189                 \end{theorem}
190                 \begin{proof}
191                         Recall: For $L : V \rightarrow V$, the nullspace of L is a subspace of $V$ made up
192                         of vectors $\vec{x} \in V$ where $L(\vec{x}) = \vec{0}$.
193
194                         Let $\{\vec{v_1}, \ldots, \vec{v_n}\}$ be a basis for $Null(L)$.
195                         We can extend this to a basis of $V$ by adding vectors
196                         $\vec{u_{k+1}}, \vec{u_{k+2}}, \ldots, \vec{u_n}$.
197
198                         For a vector $\vec{w}$ in the range of $L$, there must be a corresponding vector
199                         $\vec{x} \in V$ where
200                         \begin{equation*} \vec{w} = L(\vec{x}) \end{equation*}
201
202                         There are constants $c_1, \ldots, c_n$ such that
203                         \begin{equation*} \begin{split}
204                                 \vec{x} = c_1\vec{v_1} + c_2\vec{v_2} + \ldots + c_n\vec{v_n} \\
205                                 + c_{k+1}\vec{u_{k+1}} + \ldots + c_n\vec{u_n}
206                         \end{split} \end{equation*}
207                 \end{proof}
208
209 \section{End}
210
211 \end{document}

Random832
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Re: LaTeX and other markup!

Postby Random832 » Fri Dec 24, 2010 4:16 am UTC

Talith wrote:How about
[math]\left [ \begin{array}{rcccccl}
a_{11}x_{1}o_{1}m_{3}f_{3}g_{7}& + & a_{12}x_{2} & + & \ldots & + & a_{1n}x_{n} \\
&&&\vdots&&& \\
a_{m1}x_{1}& + & a_{m2}x_{2} & + & \ldots & + & a_{mn}x{n} \end{array}\right ][/math]
(double click the LaTeX to see the code)


I actually think it'd look better with the vdots lined up with the other dots [I'd include sample code, but don't want to insult anyone's intelligence]

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Talith
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Re: LaTeX and other markup!

Postby Talith » Fri Dec 24, 2010 5:53 pm UTC

Random832 wrote:I actually think it'd look better with the vdots lined up with the other dots [I'd include sample code, but don't want to insult anyone's intelligence]

Actually I think I agree, I just tried to stick to what the Rippy asked for. Hopefully the way it's layed it makes it pretty obvious how to move the vdots to another column.

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Re: LaTeX and other markup!

Postby Jyrki » Tue Jan 18, 2011 12:42 pm UTC

Sometimes we may feel the need to insert eps-graphics (like those produced by Mathematica). Is that possible?

Heck. I guess all I need is a way to convert eps to jpg. Any suggestions? While I'm at it, does anyone know, if it is possible to insert jpg-images into a document typeset by LaTeX? At the moment I can handle eps, which suffices for most of the things, but occasionally I get the urge to insert other types of images into e.g. sets of slides or lecture notes.

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Re: LaTeX and other markup!

Postby gmalivuk » Tue Jan 18, 2011 4:07 pm UTC

At least in the Windows version, you can just copy Mathematica output as a bitmap, and then paste it into MS Paint or GIMP or whatever your image editor of choice is. From there, save it in whatever format you like.
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antonfire
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Re: LaTeX and other markup!

Postby antonfire » Tue Jan 18, 2011 4:24 pm UTC

Jyrki wrote:I guess all I need is a way to convert eps to jpg. Any suggestions?
ImageMagick can do it.

Jyrki wrote:While I'm at it, does anyone know, if it is possible to insert jpg-images into a document typeset by LaTeX? At the moment I can handle eps, which suffices for most of the things, but occasionally I get the urge to insert other types of images into e.g. sets of slides or lecture notes.
I believe I got this to work once, but only if by going directly through pdflatex instead of the usual latex, ps, dvi, pdf thing. This unfortunately means that I couldn't get both jpegs and eps's into the same document.
Jerry Bona wrote:The Axiom of Choice is obviously true; the Well Ordering Principle is obviously false; and who can tell about Zorn's Lemma?

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Re: LaTeX and other markup!

Postby Jyrki » Tue Jan 18, 2011 9:08 pm UTC

Thanks for the suggestions, gmalivuk and antonfire.

@antonfire: Somebody else told about a similar end result (can't have both eps and jpg). Too bad :( BTW, love the quote in your sig. A long time ago I decided to simply believe in naïve set theory, Russell's paradox, Zorn's lemma and not to worry about the rest. Seems to work - in a way.

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Re: LaTeX and other markup!

Postby Ephphatha » Tue Mar 22, 2011 9:44 am UTC

I just noticed this today:

With $,

Code: Select all

$s^2_i=\frac{1}{n_i-1}\left(\displaystyle\sum^{n_i}_{j=1}x^2_{ij}-\frac{\left(\displaystyle\sum^{n_i}_{j=1}x_{ij}\right)^2}{n_i}\right)$


With \[,

Code: Select all

\[
s^2_i=\frac{1}{n_i-1}\left(\displaystyle\sum^{n_i}_{j=1}x^2_{ij}-\frac{\left(\displaystyle\sum^{n_i}_{j=1}x_{ij}\right)^2}{n_i}\right)
\]


\[
s^2_i=\frac{1}{n_i-1}\left(\displaystyle\sum^{n_i}_{j=1}x^2_{ij}-\frac{\left(\displaystyle\sum^{n_i}_{j=1}x_{ij}\right)^2}{n_i}\right)
\]

It seems to me like this shouldn't happen. Is it desired behaviour? Why?
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Re: LaTeX and other markup!

Postby phlip » Tue Apr 05, 2011 6:10 am UTC

Well, it is jsMath's default behavior... I don't think there's anything you can do about it inside code tags, unfortunately.

Code: Select all

enum ಠ_ಠ {°□°╰=1, °Д°╰, ಠ益ಠ╰};
void ┻━┻︵​╰(ಠ_ಠ ⚠) {exit((int)⚠);}
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mdyrud
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Re: LaTeX and other markup!

Postby mdyrud » Thu Jun 02, 2011 4:55 pm UTC

Is there any way to reduce the font size within math tags? I'm having trouble with an equation extending beyond the margin, but it isn't long enough to create a manual break without looking strange.

alreadytaken4536
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Re: LaTeX and other markup!

Postby alreadytaken4536 » Sun Jun 05, 2011 9:10 pm UTC

You know when you're doing a definite integral, and you've gotten rid of the integral symbol but you still have that bar thing that shows the limits of integration? What is that called and how do I make it in LaTeX?

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skeptical scientist
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Re: LaTeX and other markup!

Postby skeptical scientist » Sun Jun 05, 2011 10:01 pm UTC

alreadytaken4536 wrote:You know when you're doing a definite integral, and you've gotten rid of the integral symbol but you still have that bar thing that shows the limits of integration? What is that called and how do I make it in LaTeX?

I just use the vertical bar | like for absolute value signs. You can make it bigger using \big, \Big, \bigg, or \Bigg, e.g.

Code: Select all

\int_0^1 3x^2 \, dx = x^3 \bigg|_0^1 = 1.
which makes [math]\int_0^1 3x^2 \, dx = x^3 \bigg|_0^1 = 1.[/math] You can also use it with \left and \right to have it adapt in size to an interior expression, as you would when writing [math]\left( \frac{1}{\sin x} \right)^2.[/math] You can use \left and \right with many different types of delimiters, including parentheses, brackets, and braces. They need not match, and you can use \left. or \right. with a period after it as a placeholder if you only want a delimiter to show on one side of the delimited expression.
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Re: LaTeX and other markup!

Postby alreadytaken4536 » Sun Jun 05, 2011 10:35 pm UTC

Thank you so much! I tried doing something like that, but couldn't get it to work. Now I can make forward progress on this physics project.


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