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Results tagged with reference-request
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user 461
This tag is used if a reference is needed in a paper or textbook on a specific result.
18
votes
Errata for Atiyah–Macdonald
EDIT OF JULY 26, 2017
Proposition 2.4 page 21 reads:
Let $M$ be a finitely generated $A$-module, let $\mathfrak a$ be an ideal of $A$, and let $\phi$ be an $A$-module endomorphism of $M$ such tha …
3
votes
Subset of the plane that intersects every line exactly twice
Here is a minor variation of the proof.
We show that there is a subset $Z$ of $\mathbb R^2$ which intersects each line exactly twice.
We define the ordinals in such a way that each ordinal $a$ is th …