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awarded | Nice Question |
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revised |
divisible by all standard prime numbers
deleted 2 characters in body |
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divisible by all standard prime numbers
added 16 characters in body |
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divisible by all standard prime numbers
deleted 32 characters in body |
Apr
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revised |
divisible by all standard prime numbers
added 32 characters in body |
Apr
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answered | divisible by all standard prime numbers |
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Aug
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comment |
Algorithm for determining when polynomial iteration is bounded?
@Per: Thank you for the reference to the result on IFS undecidability. Alas, I don't see how to the IFS result here. However the second point, about the map $x\to x-1/x$ seems really interesting. Do you have a reference? |
Aug
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asked | Algorithm for determining when polynomial iteration is bounded? |
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awarded | Curious |
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awarded | Nice Answer |
Apr
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awarded | Nice Answer |
Apr
28 |
comment |
The existence of non-trivial homomorphisms $\prod_{n=1}^{\infty}\mathbb{Z}/\bigoplus_{n=1}^{\infty}\mathbb{Z}\to\mathbb{Z}/p\mathbb{Z}$
Nice. Alternatively, we can think of the last displayed item as a ring $R$, every element of which satisfies the equation $x^p=x$. So if $I$ is any maximal ideal of $R$, then the elements of the field $R/I$ all satisfy the same equation, whence $R/I$ is the $p$-element field. |
Apr
27 |
answered | The existence of non-trivial homomorphisms $\prod_{n=1}^{\infty}\mathbb{Z}/\bigoplus_{n=1}^{\infty}\mathbb{Z}\to\mathbb{Z}/p\mathbb{Z}$ |
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27 |
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