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Results tagged with definitions
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user 22156
1
vote
2
answers
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equivalence of definitions of Carmichael numbers [closed]
I would like to prove the equivalence of the two most common definitions of a composite integer $n > 1$ being a Carmichael number:
$a^n \equiv a \mod n $ for all $a$ $\iff a^{n-1} \equiv 1 \mod n$ for …
- 31
1
vote
1
answer
505
views
Simple Equivariant homology [no borel-Moore]
Hey. I'm working with Bredon's equivariant cohomology. At some point I need to compute the $4$th equivariant cohomology group of $S^1 \x D^3$ relatively to its boundary for the antipodal action of $ …
- 31