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Apr
6
comment There are no bearded men in the world - What goes wrong in this proof?
This is math? Its a question of vagueness of words...a philosophical problem (but then math is what good philosophy should try to be).
Apr
5
comment Why don't we study algebraic objects with more than two operations?
So I'm guessing that you don't count vector spaces (because the dot and scalar and vector and cross product are not on the same 'level'). So how about the reals which have an addition, multiplication, exponentiation (binary), all sorts of unary operations (elementary functions), etc. Or did you mean abstract algebras?
Apr
1
comment Formula for the $1\cdot 2 + 2\cdot 3 + 3\cdot 4+\ldots + n\cdot (n+1)$ sum
Clever...but how did you do the magic to think of converting $k(k+1)$ to the inner two terms of a cubed binomial?
Apr
1
comment Formula for the $1\cdot 2 + 2\cdot 3 + 3\cdot 4+\ldots + n\cdot (n+1)$ sum
You just did their homework!
Mar
30
comment Why can't you flatten a sphere?
@ilya: Psychology? Math is -all- about psychology.
Mar
23
awarded  Popular Question
Feb
19
comment Understanding calculus formulas intuitively
What's intuition for you? Is it a picture of a graph? Then try to draw some at first, then try to visualize later, and it'll become easier. The algebra is to notate precisely what the visions are, to keep the visions clean, and you manipulate the algebra because manipulating visual artifacts are not so precise. In a proof, the manipulations might correspond to something visual (and it is useful to make that correspondence when feasible), but sometimes the smallest algebraic step is just playing with the formalism that just isn't there in the visualization.
Feb
12
comment Is 'no solution' the same as 'undefined'?
Don't you mean the other way around?
Jan
20
awarded  Nice Question
Jan
9
awarded  Good Question
Nov
30
comment Where did mathematicians learn how to do truth tables?
Interesting. 1) it is unclear who you are saying did what (who is 'they'?). Is it Russell/Frege? Truth Tables are not done in BR or GF sources, but they are in Wittgenstein, therefore my question. 2) Can you cite any references which support this? I'm curious about the train of provenance.
Oct
27
answered solve $n^{{1/2}^k} = 1$ for $k$
Oct
27
comment Modifying Euler Totient Function
So this takes as long as factoring N, right? (plus, the computation of the terms in the sum)
Sep
16
awarded  Yearling
Aug
29
revised What is the combinatoric significance of an integral related to the exponential generating function?
fixed punctuation, wording.
Aug
29
awarded  Revival
Aug
1
comment Is there a Hamiltonian path for the graph of English counties?
Nice! quick and easy.
Aug
1
comment Is there a Hamiltonian path for the graph of English counties?
Kudos...but magic trick over. Now you have to tell us how you did that. By hand or by running algorithm (if so then by what system)? And also, how did you create such a nice picture? You lifted it somewhere? There's no shame in that, but at least give a link.
Jul
28
comment Trouble with filling out a Cayley table
$u*u = p$. What is $u*u*u$?
Jun
8
awarded  Constituent