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visits member for 3 years, 11 months
seen Aug 17 at 1:45

Dec
7
revised comparison of simplex and shortest path method
grammar
Dec
7
answered comparison of simplex and shortest path method
Dec
7
revised Are all good mathematicians fluent in computational aspects of mathematics
grammar
Dec
3
comment How to prove that either $2^{500} + 15$ or $2^{500} + 16$ isn't a perfect square?
Dude, you just gave him a fish. He'll die of starvation tomorrow.
Nov
23
revised Translating an argument into symbolic logic
fixed logical error
Nov
22
comment Translating an argument into symbolic logic
@Adam: Argh...I don't know what I was thinking. I meant absorption...fixing now.
Nov
11
awarded  Nice Answer
Nov
9
comment Show that $\frac{(2n)!}{(n)!}=2^n(2n-1)!!$
@Pauly...if you call 'helping' = 'doing the entire problem for you'
Oct
25
awarded  Popular Question
Oct
21
comment Are there any open mathematical puzzles?
I was about to remark that this is genref because of the many lists of unsolved problems in mathematics. But then I noticed that the title specifically says 'puzzles'. But then I'm not sure what the difference is between 'puzzles' and mathematical problems in general. I mean I know it when I see it but...
Oct
21
answered Are there any open mathematical puzzles?
Oct
19
comment Are there any open mathematical puzzles?
Goldbach's conjecture?
Oct
15
comment Where did mathematicians learn how to do truth tables?
@CharlesStewart: Sure, WIttgenstein wasn't incapable of understanding higher mathematics and I'm sure he would have been able to create new higher mathematics had he pursued it. I just haven't seen any evidence though of his writing's (all philosophical) influences on mathematicians (um...yes...Kripke wrote about him but wrote philosophically about Wittgenstein's non-mathematical philosophy).
Oct
5
comment Improbable vs Impossible?
'almost impossible' is not 'exactly zero' in any natural or informal language; that goes against any useful definition of 'almost'.
Sep
16
awarded  Yearling
Aug
16
comment Connecting finite automata and regular languages in teaching/applications
Yes, these are all good examples of uses of finite automata either in design or analysis of engineering systems, but does their interpretation as regular languages add anything meaningful? Well, Kleene closure really needs to be used meaningfully.
Jul
22
awarded  Popular Question
Jun
22
comment Transformation of matrix
So are you only allowed matrix operations? You want a 'closed' form that you can then manipulate? If you just want the results of such a matrix, just notate it: $A^{*}_{i,j} = A_{i, i+j}$ or 0 if $i>j$.
Jun
19
comment Where did mathematicians learn how to do truth tables?
Yes, the specific strand of culture is difficult to specify, because there are language/nation separations (in addition to the faculty differentiation), but academic borrowing, too. Also, the 20th century has seen a lot of changes in communication, which complicates the matter. If forced, I'd have to limit it to English speaking culture (where things might be likely to have been borrowed from German or French, and doubtfully from Russian or Polish (but that would be very interesting!))
May
29
answered Can $\frac{n!}{(n-r)!r!}$ be simplified?