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Jeff Strom's user avatar
Jeff Strom's user avatar
Jeff Strom's user avatar
Jeff Strom
  • Member for 14 years, 10 months
  • Last seen more than a month ago
Profile Activity

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asked
Cellular or acyclic inequalities for homotopy fibers of suspension maps
comment
whence commutative diagrams?
I'm pretty sure that the notation $f:X\to Y$ was introduced shortly before Eilenberg-MacLane (as a replacement for $f(X)\subset Y$ or the like) by, maybe, Hurewicz.
reviewed
Approve
The NP version of Matiyasevich's theorem
revised
In a fibration, can a deformation retraction of the base be lifted to the total space?
added asked-for conditions
comment
Connected Hausdorff space that is stable under collapsing two points
I wonder if such a thing could be compact. I suspect not.
reviewed
Approve
principal-bundles tag wiki
reviewed
Approve
principal-bundles tag wiki excerpt
reviewed
Approve
reductive-groups tag wiki
answered
Kunneth Theorem and localisation
comment
Collecting proofs that finite multiplicative subgroups of fields are cyclic
Fixed my argument at long last. Notice we don't need the classification for this.
revised
Collecting proofs that finite multiplicative subgroups of fields are cyclic
corrected proof of lemma, expanded final argument, grammar
answered
Combinatorial distance between simplicial complexes
reviewed
Approve
Existence of Simple Closed Straightest Geodesics
revised
The Hopf invariant is an isomorphism for $\pi_3 (S^2)$
added 7 characters in body
answered
The Hopf invariant is an isomorphism for $\pi_3 (S^2)$
reviewed
Approve
Bad Categorical Quotients
revised
Special cases of Dirichlet's theorem
added 33 characters in body
comment
Special cases of Dirichlet's theorem
Since all the $p_i$ are prime to $n$ you can use the Chinese Remainder Theorem to produce $g$.
answered
Special cases of Dirichlet's theorem
comment
The most outrageous (or ridiculous) conjectures in mathematics
The cohomology is an exterior algebra on $n$ generators, so the cup length is $n$.
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