David Cary
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 Apr18 answered If $f(t)$ is periodic, is there any $t$ that would equal to DC components? Apr5 awarded Popular Question Feb18 answered In a finite field, is there ever a homomorphism from the additive group to the multiplicative group? Dec20 awarded Caucus Oct7 awarded Revival Sep3 awarded Yearling Aug19 answered Simulate repeated rolls of a 7-sided die with a 6-sided die Aug18 comment Simulate repeated rolls of a 7-sided die with a 6-sided die @Daenyth: Huh? I see 35 non-X possibilities, 5 of them result in a 7, which gives the correct desired probability of 5/35 = 1/7 chance of resulting in a 7. Aug18 revised Simulate repeated rolls of a 7-sided die with a 6-sided die clarified (I hope) Aug18 suggested approved edit on Simulate repeated rolls of a 7-sided die with a 6-sided die Aug18 comment Simulate repeated rolls of a 7-sided die with a 6-sided die @cHao: Yes, sometimes we want exactly one fair 1d7 value, and you're right that it's impossible to do that with only 1 roll of a 1d6 dice -- we need at least 2, sometimes more, and andre shows an excellent algorithm for that case. However, if we want several hundred independent and fair 1d7 values, it is (theoretically) possible to derive those values from (on average) log(7)/log(6) =~ 1.09 rolls of a fair 1d6 die per desired 1d7 value. However, the algorithm to do that is complex and more difficult to prove that it gives fair, independent 1d7 values. Jul11 answered Why square units? Jul2 awarded Curious May19 awarded Nice Answer May19 answered Why square units? May2 comment Platonic solids and charged particles @LeeMosher: Min-Energy Configurations of Electrons On A Sphere says that N = 16 electrons has 2 local minima, but only one of them is the unique global minimum. Apr28 comment A function such that $f(f(n)) = -n$? @JackAidley: You are technically correct, but many people (apparently including corsiKa) still call the leftmost bit in signed 32-bit integers in practically all modern computers "the sign bit", even though it acts differently than the "real" sign bit in early Cray mainframes. Apr28 revised A function such that $f(f(n)) = -n$? clarified (I hope) with another example. Apr28 suggested approved edit on A function such that $f(f(n)) = -n$? Apr28 suggested rejected edit on A function such that $f(f(n)) = -n$?