Math Websites
Moderators: gmalivuk, Moderators General, Prelates
 mmmcannibalism
 Posts: 2150
 Joined: Tue Jun 30, 2009 6:16 am UTC
Re: the khan academy
I used his youtube videos to get ready for linear algebra, really clear teaching style.
Izawwlgood wrote:I for one would happily live on an island as a fuzzy sealhuman.
Oregonaut wrote:Damn fetuses and their terroist plots.
Re: the khan academy
I love his videos. I used them to learn the basics of calculus.
Re: the khan academy
I can't stand his voice, unfortunately
http://aselliedraws.tumblr.com/  surreal sketches and characters.
Re: the khan academy
I've looked at a few of the videos. He does a good job explaining problems and works through quite a few. My only gripe is that the pace in the videos is a little too slow for me, but that's much better than being too fast for anyone.
If you fight fire with fire, you'll get twice as burned.
Re: the khan academy
Wow, that's rather impressive. I'd really like to make a playlist of videos that push the math a little further and covers some basic abstract math. Some set theory and logic with some very elementary analysis, algebra, and such. I've always sort of dreamt of having some sort of resource where a person with enough determination could work from the most basic, basic arithmetic up and up through more complicated subjects. I'd say that this is an excellent start without having actually watched any of the videos myself. However, the credential he presents, if true, are sufficient for me.
What they (mathematicians) define as interesting depends on their particular field of study; mathematical anaylsts find pain and extreme confusion interesting, whereas geometers are interested in beauty.
Re: the khan academy
Eastwinn wrote:I can't stand his voice, unfortunately
I hadn't thought about this That is extremely unfortunate.
EDIT: Oh hey, there's a "Math websites" thread... I hadn't seen that Mergiemerge?
31/M/taken/US
age/gender/interest/country
age/gender/interest/country
Belial wrote:The sex card is tournament legal. And I am tapping it for, like, six mana.
 gmalivuk
 GNU Terry Pratchett
 Posts: 25850
 Joined: Wed Feb 28, 2007 6:02 pm UTC
 Location: Here and There
 Contact:
Re: Math Websites
Thy will be done.

 Posts: 7
 Joined: Tue Oct 26, 2010 8:38 pm UTC
 Location: Helsinki, Finland
Re: Math Websites
Hi!
After a fast search, I found no references to a math blog called Walks on math. I have personally found this to be a very interesting blog.
A short summary of the blog from the blog:
MT
After a fast search, I found no references to a math blog called Walks on math. I have personally found this to be a very interesting blog.
A short summary of the blog from the blog:
My idea is to start blogging once or twice a week on some interesting mathematical topics. “Interesting” will have several meanings here. I will interchangebly write posts which are interesting for
(a) high school students
(b) begginer university math.students
(c) advanced university math.students
(d) mathematicians
(e) researchers in fields close to my own
(f) people working in other fields
It is quite clear that these options are (unfotunately) almost mutually exclusive, but I promise to make as much effort as possible to make my entries to be interesting to as to many of above cathegories as possible at the same time. I will write in English since I consider it as the most universal language nowadays and I have experience in writing math in English.
MT
Re: Math Websites
I'm having trouble finding anything on discrete mathematics. The book we're using in class is terrible, and I'm kind of short on lecture notes. I found some on this website, which someone listed earlier: http://www.maths.mq.edu.au/~wchen/ln.html
But it isn't really satisfying.
Don't think anyone has mentioned this:
http://sparkcharts.sparknotes.com/
I use it mostly to get sparkcharts, which are like quick notes for revision. But there are also sparknotes, which go more indepth in various subjects.
But it isn't really satisfying.
Don't think anyone has mentioned this:
http://sparkcharts.sparknotes.com/
I use it mostly to get sparkcharts, which are like quick notes for revision. But there are also sparknotes, which go more indepth in various subjects.
Re: Math Websites
I keep in surfing for the sites that will be fit for my Grade School kids...its much appreciated if you recommend me a great site...Looking forward and Thanks in advance
Re: Math Websites
I have been trying to do complex analysis on my own and i would really appreciate any sites that a good explanation of it from the basics.

 Posts: 12
 Joined: Sun Jun 05, 2011 3:41 pm UTC
Re: Math Websites
Paul's Online Notes combined with Wolfram Alpha are my first ports of call when I have Maths assignments, great for first and second year degree stuff.
 NathanielJ
 Posts: 882
 Joined: Sun Jan 13, 2008 9:04 pm UTC
Re: Math Websites
I made a stat distribution calculator a little while ago (for computing pvalue, zvalues, tvalues, fvalues, etc):
http://www.statdistributions.com
http://www.statdistributions.com
Re: Math Websites
It's pretty nice. Is there a reason you don't allow noninteger degrees of freedom for the tdistribution (or the other distributions for that matter)?
double epsilon = .0000001;
 NathanielJ
 Posts: 882
 Joined: Sun Jan 13, 2008 9:04 pm UTC
Re: Math Websites
Dason wrote:Is there a reason you don't allow noninteger degrees of freedom for the tdistribution (or the other distributions for that matter)?
Quite honestly I'd just never thought about it, since I've never had a need for noninteger degrees of freedom myself. I'll add it to the list
Re: Math Websites
the irc #math channel on irc.freenode.net is a great resource too.
And, if you're a grad student, mathoverflow.net is great
And, if you're a grad student, mathoverflow.net is great
 modularblues
 Posts: 689
 Joined: Sun Nov 08, 2009 8:33 am UTC
 Location: Escher's Wonderland
 Contact:
Re: Math Websites
For important stuff for high school and undergraduate students try
http://www.jimloy.com/math/math.htm
Although I have an Masters in Electrical Engineering and a great interest in math, and I found a few things there that I found very helpful.
Also M. Abramowitz and I. A. Stegun has been updated and is online at
http://dlmf.nist.gov/
http://www.jimloy.com/math/math.htm
Although I have an Masters in Electrical Engineering and a great interest in math, and I found a few things there that I found very helpful.
Also M. Abramowitz and I. A. Stegun has been updated and is online at
http://dlmf.nist.gov/

 Posts: 5
 Joined: Mon Sep 19, 2011 8:03 pm UTC
Online Differentiator
I'm trying to teach myself Calculus, working from the Understand Calculus book from www.teachyourself.com but I'm having trouble when I can't get the right answer to the quiz questions.
Does anyone know of a website that will differentiate equations and show how it arrived at its answer so that I can see where it is I'm going wrong? I've found plenty of differentiation tools by searching Google but they all go straight from the expression to the differential without showing how they got there.
Does anyone know of a website that will differentiate equations and show how it arrived at its answer so that I can see where it is I'm going wrong? I've found plenty of differentiation tools by searching Google but they all go straight from the expression to the differential without showing how they got there.
 jestingrabbit
 Factoids are just Datas that haven't grown up yet
 Posts: 5963
 Joined: Tue Nov 28, 2006 9:50 pm UTC
 Location: Sydney
Re: Math Websites
If you have a look at
you should be able to see a "show steps" button on its first answer.
Code: Select all
http://www.wolframalpha.com/input/?i=diff%28sin%28x^2%29*e^x%2C+x%29
you should be able to see a "show steps" button on its first answer.
ameretrifle wrote:Magic space feudalism is therefore a viable idea.
Re: Math Websites
Hey all. I just started math at college this semester and I was struggling a bit with proofs. Once someone I'm working with specifies the first step or two I can usually get it, but when I look at pretty much any question that starts with "Prove..." My mind is completely barren of methods to start. Are there any websites or articles that give a good overview of proof tactics or methods? My math is currently Calc 3, but I'm also taking Honors Mechanics, which is pretty proof based as well.
Thanks,
Jexas
Thanks,
Jexas
Re: Math Websites
There are several collections of links on the social bookmarking site Delicious (that is what it is for).
Here is one that is relevant to this thread:
Math Sites on Delicious
All pages are conveniently tagged, to make finding a particular type of online math resource easy: forum, blog, software, reference, etc.
(Click on the "alpha" link on the right side of the page to have tags ordered alphabetically, makes them easier to go through.)
Here is one that is relevant to this thread:
Math Sites on Delicious
All pages are conveniently tagged, to make finding a particular type of online math resource easy: forum, blog, software, reference, etc.
(Click on the "alpha" link on the right side of the page to have tags ordered alphabetically, makes them easier to go through.)
Re: Math Websites
dcb2011 wrote:There are several collections of links on the social bookmarking site Delicious (that is what it is for).
Sigh. This gave me hope, for a little while...
...you see, the other day I was browsing around, and I found this funky little math site. You typed in some text, and it would come up with an equation that, when graphed, would spell out the text you typed (a la Tupper but with English text rather than a formula). It showed you the graph too.
But of course, I didn't bookmark it  "I won't forget that", I said to myself. Bah! I've Googled, I've Binged, and I've come up blank. Curse the dissolute decade of my twenties, that ruined my shortterm memory.
Does anyone reading know where the site may be found?
Re: Math Websites
Jexas wrote:Hey all. I just started math at college this semester and I was struggling a bit with proofs. Once someone I'm working with specifies the first step or two I can usually get it, but when I look at pretty much any question that starts with "Prove..." My mind is completely barren of methods to start. Are there any websites or articles that give a good overview of proof tactics or methods? My math is currently Calc 3, but I'm also taking Honors Mechanics, which is pretty proof based as well.
Thanks,
Jexas
Have you tried http://www.proofwiki.org?
Re: Math Websites
My son uses the Khan Academy. He finds just watching the video's very helpful. I think we all learn slightly differently. He has dyslexia and that can add challenges for his math or not.
 Talith
 Proved the Goldbach Conjecture
 Posts: 848
 Joined: Sat Nov 29, 2008 1:28 am UTC
 Location: Manchester  UK
Re: Math Websites
The website you never knew you needed http://randomgreekletter.co.nr/ .
Re: Math Websites
The khan Acadamy is also very good if that is your learning style.
Re: Math Websites
5pinan wrote:...you see, the other day I was browsing around, and I found this funky little math site. You typed in some text, and it would come up with an equation that, when graphed, would spell out the text you typed (a la Tupper but with English text rather than a formula). It showed you the graph too.
But of course, I didn't bookmark it  "I won't forget that", I said to myself. Bah! I've Googled, I've Binged, and I've come up blank. Curse the dissolute decade of my twenties, that ruined my shortterm memory.
Does anyone reading know where the site may be found?
Could this be it?
http://webdemo.visionobjects.com/equation.html
Beyond that, I cannot think of anything.
Of course, there are many online graphers. You type in an equation and a graph is produced.
Or you type in some data and a graph is produced.
Your description is a little confusing: you type in text, a graph is produced, and then text is output (the same text you just typed in?!).
Re: Math Websites
dcb2011 wrote:5pinan wrote:...you see, the other day I was browsing around, and I found this funky little math site. You typed in some text, and it would come up with an equation that, when graphed, would spell out the text you typed (a la Tupper but with English text rather than a formula). It showed you the graph too.
But of course, I didn't bookmark it  "I won't forget that", I said to myself. Bah! I've Googled, I've Binged, and I've come up blank. Curse the dissolute decade of my twenties, that ruined my shortterm memory.
Does anyone reading know where the site may be found?
Could this be it?
http://webdemo.visionobjects.com/equation.html
Beyond that, I cannot think of anything.
Of course, there are many online graphers. You type in an equation and a graph is produced.
Or you type in some data and a graph is produced.
Your description is a little confusing: you type in text, a graph is produced, and then text is output (the same text you just typed in?!).
They mention Tupper so I doubt it. I think they mean you type "Hello" and then you get an equation that plots something that looks like "Hello".
double epsilon = .0000001;
Re: Math Websites
A math website that is below the difficulty level of math overflow (but quite well populated) is:
http://math.stackexchange.com/
Questions posted here need not be 'researchlevel'.
http://math.stackexchange.com/
Questions posted here need not be 'researchlevel'.
Re: Math Websites
Nice online math game, college level difficulty.
http://www.graphwar.com/
http://www.graphwar.com/
Re: Math Websites
Could someone point me to good resources for basic to advanced maths? I know it's a lot to ask, but I'd like to find free online resources that basically start from scratch, and that are wellstructured. I don't want to miss any building block of the greater mathematical knowledge, if you know what I mean. I'd be particuarly interested in resources that stress the purpose of what we're learning  that is, not simply a how to knowledge, but also why it works that way, what it is useful for and why it should interest me. IDK if that exists... :'(
Re: Math Websites
@kizolk:
I don't know if this is what you're looking for, but I've heard great things about Khan Academy.
I don't know if this is what you're looking for, but I've heard great things about Khan Academy.
What they (mathematicians) define as interesting depends on their particular field of study; mathematical anaylsts find pain and extreme confusion interesting, whereas geometers are interested in beauty.
Re: Math Websites
The Khan Academy is fantastic at what it does, but there are a lot of gaps in a full collegiate mathematical education. To this point, his efforts have been restricted to applied analysis, so you've got calculus, intro to ODEs, linear algebra (but only R^k), and two semesters of statistics. That's a lot, but there is still no foundations, real analysis, abstract algebra, logic, graph theory, or anything else of that sort.
Re: Math Websites
As I said, I kinda want to start from scratch, so I'll worry about more advanced topics later. From what I've seen, this site is exactly what I was looking for, thanks z4lis!
Re: Math Websites
MathOverflow is down. I'm so bored.
 DataGenetics
 Posts: 21
 Joined: Sat Jan 01, 2011 1:12 am UTC
 Location: Seattle
Re: Math Websites
I know it's a self plug*, but if you like reading the works of Martin Gardner (he was a great influence in my life), you might like some of the postings on my blog.
http://www.datagenetics.com/blog.html
*Read a couple of articles before flaming
/\/ick
http://www.datagenetics.com/blog.html
*Read a couple of articles before flaming
/\/ick
Re: Math Websites
A great site for teaching is NASA's PUMAS, Practical Uses of Math and Science. Essays written by professionals who explain how they use math in their work. Well done.
Re: Math Websites
I chanced upon this Math website which has some really interesting kids' math games, useful for both classroom teaching as well as for homeschooling parents. The best thing about this website is that they have math games, activities and worksheets arranged grade wise, so you can pick and choose what suits you. Worksheets, mobile games, tips for parents  the ideal resource for those who wish to teach math to their young ones.
Re: Math Websites
a great Post,thank you for your share.
Who is online
Users browsing this forum: No registered users and 10 guests