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Feb
19
comment Why is the inverse of a sum of matrices not the sum of their inverses?
In general, any identity that is not true for real numbers is not going to be true for matrices.
Feb
9
comment Algorithms for Symbolic Manipulation
I don't think the WolframAlpha step-by-step integration is using the Risch algorithm. It's likely just using a rules based system with pattern matching.
Feb
5
comment An impossible sequence of Tetris pieces.
Wait, so is it or isn't it true that the line piece is drawn with decreased probability?
Jan
8
comment Finding the location of an image of the Mandelbrot set
Note that the linked image (which I guess you edited out of my question) is higher quality, because SO compresses the image when you insert it, but the original is uncompressed png.
Jan
8
comment Finding the location of an image of the Mandelbrot set
I was hoping for a general algorithm (or a hint at a computational algorithm), but seeing what @MarkMcClure was able to do for just this one was pretty cool.
Jan
6
comment Finding the location of an image of the Mandelbrot set
I tried uploading the image here, but it looks like SE compresses images, which isn't very helpful. Here is the full uncompressed version.
Jan
6
asked Finding the location of an image of the Mandelbrot set
Dec
16
answered Is Cantor's diagonal argument dependent on the base used?
Dec
12
awarded  Favorite Question
Dec
8
awarded  Caucus
Dec
1
comment Proving formula for sum of squares with binomial coefficient
Note that many (all?) of the proofs here implicitly assume that $n \geq 3$. But you can prove $n = 0, 1, 2$ manually.
Dec
1
answered Proving formula for sum of squares with binomial coefficient
Nov
15
comment Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$
It seems the Sandifer link is now a dead link.
Nov
15
revised Infinite Series with Pi
use \left and \right
Nov
14
answered Give a concrete sequence of rationals which converges to an irrational number and vice versa.
Nov
9
awarded  Famous Question
Oct
9
comment Am I just not smart enough?
By the way, another tough nut to swallow: you may find some areas of mathematics to be very interesting, but very difficult for your brain to actually work with. I find most mathematics to be at least moderately interesting, but there are only a few areas where I work the best.
Oct
9
answered Am I just not smart enough?
Sep
24
awarded  Autobiographer
Sep
23
awarded  Notable Question