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Apr
19
comment Is there a way of defining the notion of a variable mathematically?
I think I understand what you are getting at. If we take an informal expression with variables and make it formal ala metamath, we would get some string of symbols involving those variables, which is just a string in some formal language. Thus, in the language of metamath, a variable is any greek and roman letter that appears in a string of that language.
Apr
18
asked Is there a way of defining the notion of a variable mathematically?
Apr
18
revised The topology of distributions
deleted 59 characters in body
Apr
18
asked The topology of distributions
Apr
10
comment About the notation of the probability measures
It should be since $P^{X_n}$ is a measure on the image space of $X_n$.
Apr
6
accepted Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$
Apr
6
comment Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$
You are absolutely right. Thank you for pointing this out.
Apr
6
comment Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$
It didn't occur to me to check the first equation. I knew something was fishy. I am convinced that it is a typo. Thanks.
Apr
6
asked Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$
Feb
3
accepted Characters and permutation matrices
Feb
2
comment Characters and permutation matrices
Are saying that because the permutation representation is reducible, $\chi$ is not a bonafide "character"?
Feb
2
comment Characters and permutation matrices
So you are saying that it should be $\chi(gg^{-1})=\chi(g)+\chi(g^{-1})$? And what do you mean by "characters of degree 1"? Aren't all characters one-dimensional representations?
Feb
2
asked Characters and permutation matrices
Dec
14
accepted dy/dx when x and y are functions
Dec
14
asked Generalization of manifold
Dec
14
accepted Edge coloring of a $k$-regular bipartite graph
Dec
14
comment Edge coloring of a $k$-regular bipartite graph
I do not mind using Hall's marriage theorem. This is really neat. Thanks a lot.
Dec
14
accepted Rigorous Proof of the Principle of Counting
Dec
14
answered Samples and random variables
Nov
22
awarded  Nice Question