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seen Feb 8 '13 at 16:36

Oct
24
comment The Pigeon Hole Principle and the Finite Subgroup Test
I think #2 is supposed to read 'Choose any $a$ in $H$...'
Apr
10
comment what is f prime?
I think $m(B(x,r))$ is supposed to be the measure of the open ball of radius $r$ centered at $x$, which would be...$2r$?
Nov
22
awarded  Supporter
Oct
15
comment The Hangman's Noose - A Logical Paradox
I'm probably not fully appreciating the logical subtleties here, but is it cheating to simply conclude that the executioner is wrong or lying? This is exactly the way we prove things all the time using proof by contradiction. All this shows is that " A AND B " must be false.
Sep
19
awarded  Teacher
Sep
19
answered Calulating length of cable running along exterior of an axle
Aug
7
answered Number of ways to partition a rectangle into n sub-rectangles