crasic
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# 153 Actions

 Oct27 comment Windows lightweight Math Software @Vojtech It's pretty good for basic plotting. It has a syntax that is pretty much identical to matlab. A lot of people (me included) use it to plot figures for papers Oct27 revised Windows lightweight Math Software deleted 10 characters in body Oct27 answered Windows lightweight Math Software Oct27 comment Do the equations used in Stargate make sense or are they gibberish? I know the equation you are talking about (the one Chloe solved). From what I remember it was a simple integral (I didn't pay too close attention so it may have been improperly written) that any 1st year calculus student can solve. Oct27 accepted Subgroups of finitely generated groups are not necessarily finitely generated Oct27 comment Identity involving Euler's totient function: $\sum \limits_{k=1}^n \left\lfloor \frac{n}{k} \right\rfloor \varphi(k) = \frac{n(n+1)}{2}$ What immediately jumps out is how such a complicated function like the totient function has an identity involving the simple summation of integers 1 to n. Seems like a good way to prove it is to show that the expression inside the sum is a "rearrangement" of the sequence of integers 1 to n Oct27 awarded Supporter Oct26 comment Are Continuous Functions Always Differentiable? As the last American president demonstrated, every potential threat deserves maximum military action. Oct26 answered Are Continuous Functions Always Differentiable? Oct26 asked Subgroups of finitely generated groups are not necessarily finitely generated Oct15 comment The Hangman's Noose - A Logical Paradox I understand that its an open question and that there is much debate on the topic, no reason not to extend the debate to here. Oct15 asked The Hangman's Noose - A Logical Paradox Oct15 accepted Coloring the faces of a hypercube Sep29 answered How do you define functions for non-mathematicians? Sep29 comment Coloring the faces of a hypercube The question was really about extending Burnside's lemma to a higher dimensional figure. How would one answer the same question, but about a hypercube. Sep29 revised Coloring the faces of a hypercube added 1047 characters in body; edited tags; deleted 2 characters in body Sep29 asked Coloring the faces of a hypercube Sep29 accepted Taking Seats on a Plane Sep29 comment Taking Seats on a Plane This is a good intuitive way to think about it. A formal proof is too heavy for a over-a-cup-of-coffee discussion, this is just right. I'll give you the credit since nobody seems to want to take a shot at the physical application Sep27 asked Taking Seats on a Plane