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| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 2 years, 9 months |
| seen | 4 hours ago | |
| stats | profile views | 60 |
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Jun 8 |
awarded | Caucus |
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Jun 1 |
comment |
Continuous and Open maps A continuous function that maps open sets to open sets is just called an open map as far as I know. |
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Apr 20 |
comment |
Is there a way of defining the notion of a variable mathematically? Thanks for the example. However, I am not convinced this clarifies what a variable is. Calling the symbol $x$ a variable when defining a polynomial ring $F[x]$ does not define what a variable is. |
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Apr 20 |
accepted | Is there a way of defining the notion of a variable mathematically? |
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Apr 19 |
comment |
The topology of distributions Excellent. Thanks. |
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Apr 19 |
comment |
Is there a way of defining the notion of a variable mathematically? I do not see the connection. Can you give me a concrete example? |
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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. |
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Apr 18 |
asked | Is there a way of defining the notion of a variable mathematically? |
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Apr 18 |
revised |
The topology of distributions deleted 59 characters in body |
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Apr 18 |
asked | The topology of distributions |
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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 $X_n$. |
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Apr 6 |
accepted | Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$ |
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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. |
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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. |
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Apr 6 |
asked | Given $\int_0^x f(t) \, dt = 2\cos x + 3x + 2,$ find $f$ |
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Feb 3 |
accepted | Characters and permutation matrices |
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Feb 2 |
comment |
Characters and permutation matrices Are saying that because the permutation representation is reducible, $\chi$ is not a bonafide "character"? |
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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? |
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Feb 2 |
asked | Characters and permutation matrices |
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Dec 14 |
accepted | dy/dx when x and y are functions |
