## Search found 63 matches

- Mon Dec 05, 2011 5:40 pm UTC
- Forum: Mathematics
- Topic: Putnam (aka halp!)
- Replies:
**17** - Views:
**2535**

### Re: Putnam (aka halp!)

For A4, its easy to see that for odd n it works: just put 0's for the diagonal and 1's for every other cell. Then I (almost) proved that if n works, then n + 1 cannot work. So basically add a row and a column to a n x n matrix that works. Now the last column from rows 1 to n must all be 0 (even), el...

### Re: The wall

Are you past the point-of-no-return on your thesis? Why not start another thesis? Or maybe finish this thesis, then do another project? Or maybe just do the best you can with the material you seem force to have presented?

- Wed Sep 14, 2011 4:00 am UTC
- Forum: Logic Puzzles
- Topic: Interesting Math/Logic Puzzle
- Replies:
**4** - Views:
**2239**

### Re: Interesting Math/Logic Puzzle

Good job! How do you know?

- Wed Sep 14, 2011 2:41 am UTC
- Forum: Logic Puzzles
- Topic: Interesting Math/Logic Puzzle
- Replies:
**4** - Views:
**2239**

### Interesting Math/Logic Puzzle

A certain young person was asked about her birthday (this happened

around 1950). I was born on September 6, she said, but I celebrate my birthday

not every year, but every 1000 days. I find this much more convenient. My last

celebration was on August 1, 1948.

What year was she born?

around 1950). I was born on September 6, she said, but I celebrate my birthday

not every year, but every 1000 days. I find this much more convenient. My last

celebration was on August 1, 1948.

What year was she born?

- Sun Aug 28, 2011 4:06 pm UTC
- Forum: School
- Topic: Are you looked down on for not having a job in college?
- Replies:
**22** - Views:
**6032**

### Re: Are you looked down on for not having a job in college?

It obviously varies from person to person, but in my opinion its a resounding "yes." Did you work during High School? Ever hold a job? If not, its a very eye-opening experience to the tediums of life. I would suggest you get a job at a supermarket or something. It'll teach you about schedu...

- Sun Aug 07, 2011 3:01 pm UTC
- Forum: Mathematics
- Topic: Radians and calculus
- Replies:
**15** - Views:
**3329**

### Re: Radians and calculus

It's because radians are "dimensionless", whereas degrees have a unit.

- Sun Jul 10, 2011 10:31 pm UTC
- Forum: Mathematics
- Topic: How difficult is Discrete Mathematics?
- Replies:
**23** - Views:
**14099**

### Re: How difficult is Discrete Mathematics?

I actually go to binghamton!

discrete wasn't too bad, but i found calc 3 mad hard.

discrete wasn't too bad, but i found calc 3 mad hard.

- Tue Jun 07, 2011 7:49 pm UTC
- Forum: Mathematics
- Topic: Does this function do anything interesting?
- Replies:
**3** - Views:
**869**

### Re: Does this function do anything interesting?

Observe what happens as you let epsilon go to 0 for [math]\frac{\delta(f, x, \epsilon)}{\epsilon}[/math]

- Tue Jun 07, 2011 2:19 am UTC
- Forum: School
- Topic: Wow, time flies
- Replies:
**6** - Views:
**3003**

### Re: Wow, time flies

I remember my 5th year of high school... and my 6th... and my 7th... the rest is kinda hazy...

- Sun Jun 05, 2011 3:34 pm UTC
- Forum: Mathematics
- Topic: LOCKED
- Replies:
**3** - Views:
**1436**

### Re: LOCKED

Oh. My. God. You're right!! You did find a new form of the mathematics! Guys, we should start a pool to give this guy "$1M" that he deserves for revolutionizing mathematics in an abstruse, non-comprehensible manner!!!!

- Sat May 28, 2011 1:23 pm UTC
- Forum: Mathematics
- Topic: alternative mathematics
- Replies:
**128** - Views:
**15253**

### Re: alternative mathematics

Can a mod please lock this thread/ban the OP? I think its time.

- Fri May 27, 2011 3:05 am UTC
- Forum: Mathematics
- Topic: Interesting Problems?
- Replies:
**33** - Views:
**4733**

### Re: Interesting Problems?

There is the Diophantine Equation: y^3 = x^2 + 2, which has only one solution, and that solution is easy enough to find. The interesting bit is that the proof that this is the only solution is quite tricky(I do not know the proof and am attempting to find it at present, so I do not wish to spoil it...

- Fri May 27, 2011 2:45 am UTC
- Forum: Coding
- Topic: Some game programming advice
- Replies:
**12** - Views:
**2253**

### Re: Some game programming advice

A*, or less generally Dijkstra's Algorithm, is the "best" way to find the minimum path when there are no non-negative weights.

- Thu May 26, 2011 7:18 pm UTC
- Forum: Mathematics
- Topic: alternative mathematics
- Replies:
**128** - Views:
**15253**

### Re: alternative mathematics

33 (0,1,2,3, +33 (0,1,2,3,4,5) =x (0,1,2,3,4,5,6,7) I see that you do not think mathematically and I will solve the task I have given you.here are given the numbers of different scales of natural numbers, converting them to the 33 (0,1,2,3) =17 (0,1,2,3,4,5,6,7) 33 (0,1,2,3,4,5) =25 (0,1,2,3,4,5,6,...

- Wed May 25, 2011 1:52 pm UTC
- Forum: Mathematics
- Topic: alternative mathematics
- Replies:
**128** - Views:
**15253**

### Re: alternative mathematics

Every single post of yours makes *absolutely* *no* *sense*, kumarevo. We can't read your mind, so make sensical graphics & arguments, or please stop posting.

- Tue May 24, 2011 7:30 pm UTC
- Forum: Mathematics
- Topic: Recently awakened love for mathematics. How do I pursue?
- Replies:
**4** - Views:
**1091**

### Re: Recently awakened love for mathematics. How do I pursue?

Become an expert in a field! Maybe you're into Number Theory, so read up all about it, look at unsolved problems within that field, and maybe attempt to solve it, and look at other failed solutions.

- Mon May 23, 2011 8:35 pm UTC
- Forum: Mathematics
- Topic: alternative mathematics
- Replies:
**128** - Views:
**15253**

### Re: alternative mathematics

I still have no idea what this guy is even driving at. Did he just create a line?

- Sun May 22, 2011 6:29 pm UTC
- Forum: Mathematics
- Topic: How to recognize an undervalued stock
- Replies:
**8** - Views:
**1719**

### Re: How to recognize an undervalued stock

Thanks for the responses everyone!

- Fri May 20, 2011 3:05 pm UTC
- Forum: Computer Science
- Topic: Mnemonic device for little/big-endian; or Fix My Brain
- Replies:
**16** - Views:
**5676**

### Re: Mnemonic device for little/big-endian; or Fix My Brain

Moose Hole wrote:I had the same problem with, "Righty tighty, lefty loosey." Does the top of the screw go right, or the bottom? Clockwise and counterclockwise make a lot more sense for screws.

How often are you turning screws upside down? lol

- Wed May 18, 2011 4:00 pm UTC
- Forum: Computer Science
- Topic: So I tried CPU design
- Replies:
**5** - Views:
**3417**

### Re: So I tried CPU design

Whats the point of having two branching instructions? BNA = subtract from the program counter and BPA = add from the program counter?

- Wed May 18, 2011 3:49 pm UTC
- Forum: Mathematics
- Topic: How to recognize an undervalued stock
- Replies:
**8** - Views:
**1719**

### How to recognize an undervalued stock

This seems like the most relevant board to post this in... I'm a current CS/Math student at college, and I was thinking about getting in to the stock market, so I am kinda novice. I was thinking of trying to invest by buying undervalued stocks. But how does one come to the conclusion that a stock is...

- Fri May 06, 2011 4:11 pm UTC
- Forum: School
- Topic: AP Physics on Monday!
- Replies:
**37** - Views:
**5856**

### Re: AP Physics on Monday!

Good luck fickle high school students! I remember being super stressed for these AP exams, but don't worry - it won't really matter much. And the top schools don't even take AP credits! ><

- Fri May 06, 2011 4:09 pm UTC
- Forum: Coding
- Topic: Building an ALU
- Replies:
**11** - Views:
**3214**

### Re: Building an ALU

Also you should look up Carry Look-Ahead adder, its the best method to add two binary digits of size N.

- Tue Apr 19, 2011 9:36 pm UTC
- Forum: Computer Science
- Topic: A digital currency with no judging authorities
- Replies:
**19** - Views:
**3218**

### Re: A digital currency with no judging authorities

I'm a little confused, maybe you can explain the premise behind this whole thing to the uninitiated? So the idea is that you get paid in a currency, and have the ability to lend out and borrow money from anyone, without the use of a bank? If that's the case, how do I grow my money? In the current ma...

- Sun Apr 10, 2011 4:33 pm UTC
- Forum: Coding
- Topic: Java Programming Question
- Replies:
**4** - Views:
**1064**

### Java Programming Question

Hey guys,

I've been looking around and can't seem to find the answer to this: is it possible to create a Java applet which will allow the user to use a "paint" like program, and then save it as an image file?

I've been looking around and can't seem to find the answer to this: is it possible to create a Java applet which will allow the user to use a "paint" like program, and then save it as an image file?

- Sun Mar 27, 2011 3:38 pm UTC
- Forum: Mathematics
- Topic: Google/Microsoft Interview Question
- Replies:
**4** - Views:
**1315**

### Google/Microsoft Interview Question

I was reading potential interview questions for Google & Microsoft, and I came across an interesting one: "Why are manhole covers round?" My answer was because circles are the only shape that can't fall down a hole of itself. Is it true that circles are unique in this property, or do t...

- Tue Jan 04, 2011 7:55 pm UTC
- Forum: Coding
- Topic: Programming Challenge Sites (other than Project Euler)
- Replies:
**10** - Views:
**6549**

- Thu Dec 16, 2010 6:13 pm UTC
- Forum: News & Articles
- Topic: Britain increases tuition, met with violent protests
- Replies:
**148** - Views:
**12958**

### Re: Britain increases tuition, met with violent protests

Does this 9000 pound fee cover both "tuition" and "room and board"?

- Thu Dec 16, 2010 4:48 am UTC
- Forum: News & Articles
- Topic: Federal Judge rules parts of The Affordable Care Act unconstitutional
- Replies:
**90** - Views:
**8064**

### Re: Federal Judge rules parts of The Affordable Care Act unconstitutional

I don't get why people are so up in arms over being forced to have healthcare. If everyone has healthcare, costs go down. It's simple economics. Erm. How, exactly? I don't believe I've ever read anything suggesting this would actually be a cost reduction measure in any sense. In addition to what th...

- Thu Dec 16, 2010 1:31 am UTC
- Forum: News & Articles
- Topic: Federal Judge rules parts of The Affordable Care Act unconstitutional
- Replies:
**90** - Views:
**8064**

### Re: Federal Judge rules parts of The Affordable Care Act unconstitutional

I don't get why people are so up in arms over being forced to have healthcare. If everyone has healthcare, costs go down. It's simple economics. Similarly, if a non-insured person gets sick and doesn't have the money to pick up the tab, the taxpayer is forced to pick up the bill.

- Sun Nov 14, 2010 9:54 pm UTC
- Forum: Mathematics
- Topic: Sum of factors.
- Replies:
**7** - Views:
**1277**

### Re: Sum of factors.

Ivor Zozz wrote:A question came to me while reading the OP: How would I prove that p^{n}has exactly n-1 nontrivial factors (with p being prime, as above)?

if n=p^n

then n=p^n-k*p^k

- Tue Aug 26, 2008 2:26 am UTC
- Forum: Mathematics
- Topic: Question on Elliptic Curves
- Replies:
**2** - Views:
**996**

### Question on Elliptic Curves

Hello all, Recently I got the Book Rational Points on Elliptic Curves, and I came across something I didn't understand. The author claimes that the curves x^3 + y ^3= 9 has a "one-to-one correspondece" to the rational points on Y^2 = X^3 - 48? How does he get this? Because earlier in the b...

- Fri Jul 25, 2008 3:30 pm UTC
- Forum: Mathematics
- Topic: Research Ideas
- Replies:
**13** - Views:
**1951**

### Re: Research Ideas

Thank you guys so much for your replies!! Terry Tao's blog is really good. I am indeed in high school, and your questions made me realize that even I don't know what to do o_o. So I'm asking a friend who takes Math Research at my school what I'm supposed to be doing. haha, I would've been screwed fo...

- Mon Jul 21, 2008 3:09 am UTC
- Forum: Mathematics
- Topic: Research Ideas
- Replies:
**13** - Views:
**1951**

### Research Ideas

Hey guys, I'm doing Math Research at my school next year, and I'm stuck to find a project! At first, I extensively studied the Collatz Conjecture, but I got nowhere so I gave up. Then I went to Euler Bricks, and again, I got stuck. So I'm wondering if any of you can suggest a good problem for me to ...

- Wed Jul 02, 2008 4:44 pm UTC
- Forum: Mathematics
- Topic: infinity
- Replies:
**91** - Views:
**10372**

### Re: infinity

(Sorry to digress) I think that natural numbers exist in the nature, without human's minds, as they describe real objects extremely well.

As that one guy once said, "God invented the integers, the rest is up to the work of man"

As that one guy once said, "God invented the integers, the rest is up to the work of man"

- Mon Jun 30, 2008 11:52 pm UTC
- Forum: Mathematics
- Topic: Periodic Interpolation
- Replies:
**2** - Views:
**1062**

### Periodic Interpolation

Hi guys, I've checked around the internets and my calc textbook, but I couldn't find the answer to this question, so I shall ask it here. Say I have a function f(x) where f(1)=1 f(2)=4 f(3)=2 and f(4)=1 again and the cycle repeats like that. Is there anyway through some kind of sine curve I can inte...

- Tue Jun 03, 2008 11:18 pm UTC
- Forum: Mathematics
- Topic: Cryptography
- Replies:
**43** - Views:
**9402**

### Re: Cryptography

haha, I was just reading about this ARG on unfiction this morning, it costs a lot, though

- Sat May 03, 2008 10:50 pm UTC
- Forum: Mathematics
- Topic: Mathematical Economics
- Replies:
**8** - Views:
**1541**

### Re: Mathematical Economics

mathmagic wrote:themandotcom wrote: So I researched some stuff on the internet, and I really can't find anything good(even Wikipedia :O)

LIES

http://en.wikipedia.org/wiki/Mathematical_economics

Yeah, but it doesn't say anything , and all papers are through Science Direct, which my school doesn't have a subscription to

- Fri May 02, 2008 9:16 pm UTC
- Forum: Mathematics
- Topic: Mathematical Economics
- Replies:
**8** - Views:
**1541**

### Mathematical Economics

I was reading my calculus text (Thomas, I believe), and they do some cool things with calculus to prove some things in economics. So I researched some stuff on the internet, and I really can't find anything good(even Wikipedia :O) So, does anyone have any cool sights/theorems to show me? Thanks so m...

- Sat Mar 01, 2008 8:30 pm UTC
- Forum: Mathematics
- Topic: AMC 12(B)
- Replies:
**10** - Views:
**1888**

### AMC 12(B)

Did anyone take it? If so, how'd you do? I think I did really well, compared to my peers, but I def didn't get into the AIME :(. Anyways, I have a question: Define f(z)=(4+i)z 2 +(alpha)z+(gamma) where alpha and gamma are complex numbers If f(1) and f(i) are real, what is the smallest value from |(a...