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Lucas Seco's user avatar
Lucas Seco's user avatar
Lucas Seco
  • Member for 13 years, 11 months
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question
26
Are there "principal" bundles $S^1 \to S^3 \to S^2$ other then Hopf's? (They would be necessarily not locally trivial)
Aug 23, 2016
answer
18
Is there a Morse theory proof of the Bruhat decomposition?
Jan 12, 2011
answer
16
Why do the homology groups capture holes in a space better than the homotopy groups?
Jul 3, 2017
answer
14
How did Bernoulli prove L'Hôpital's rule?
Jan 12, 2011
question
11
Is the eigenvalue map open?
May 16, 2023
answer
8
Origin of terms "flag", "flag manifold", "flag variety"?
Aug 6, 2012
question
5
Homeomorphisms of Springer fibers
Apr 15, 2019
question
5
Fundamental group of compact globally symmetric spaces
Jan 15, 2022
answer
5
Double quotients of Coxeter groups have the chain property?
Jul 24, 2014
question
4
Is a smooth union of lines is a subspace?
Jul 26, 2014
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12
Two polynomials $r_1, r_2 \in R[X]$ are equal if and only if the cofficients $a_i, b_i$ are equal for all $i, 0 \leq i \leq n$ - Purely a definition?