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Tim Campion

South Bend, IN, USA

http://sites.nd.edu/tcampion/

I'm a sixth year math grad student at the University of Notre Dame.

My advisor is Chris Schommer-Pries.

I can be contacted at tcampion@(the letter enn then the letter dee).edu

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Top Questions
97 votes

Errata for Atiyah–Macdonald

reference-request ac.commutative-algebra big-list asked Oct 15 '10 at 0:56
mathoverflow.net

55 votes

Heuristic argument that finite simple groups _ought_ to be "classifiable"?

gr.group-theory soft-question finite-groups model-theory asked Sep 9 '10 at 10:05
mathoverflow.net

50 votes

Why are LIGO's beam tubes so wide?

experimental-physics ligo asked May 25 '16 at 23:40
physics.stackexchange.com

41 votes

Do vector spaces without choice satisfy Cantor-Schroeder-Bernstein?

linear-algebra set-theory lo.logic axiom-of-choice vector-spaces asked Oct 23 '20 at 17:03
mathoverflow.net

38 votes

A map of non-pathological topology?

gn.general-topology soft-question big-picture asked Jun 6 '19 at 4:57
mathoverflow.net

38 votes

Is there anything to the obvious analogy between Joyal's combinatorial species and Goodwillie calculus?

co.combinatorics at.algebraic-topology ct.category-theory homotopy-theory higher-category-theory asked Apr 4 '17 at 1:22
mathoverflow.net

37 votes

Does the category of (algebraically closed) fields of characteristic $p$ change when $p$ changes?

nt.number-theory ct.category-theory model-theory galois-theory fields asked Apr 8 '16 at 0:22
mathoverflow.net

35 votes

Is there a general theory of "compactification"?

ag.algebraic-geometry dg.differential-geometry ct.category-theory gn.general-topology compactifications asked Oct 14 '19 at 14:48
mathoverflow.net

35 votes

What is the cotangent complex good for?

ag.algebraic-geometry ac.commutative-algebra homotopy-theory derived-algebraic-geometry cotangent-complex asked Sep 20 '20 at 4:33
mathoverflow.net

33 votes

What is the point of pointwise Kan extensions?

ct.category-theory asked Oct 7 '15 at 3:10
mathoverflow.net

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Top Answers
40
What is a Frobenioid?
mathoverflow.net

39
Opt-in alpha test for a new Stacks editor
meta.stackexchange.com

35
What parts of the theory of quasicategories have been simplified since the publication of HTT?
mathoverflow.net

30
Prominent non-mathematical work of mathematicians
mathoverflow.net

26
Why are quasi-categories better than simplicial categories?
mathoverflow.net

25
Should every modern day mathematician care about category theory?
mathoverflow.net

22
Is $\mathrm{Graph}$ cartesian-closed?
mathoverflow.net

20
Are locally presentable categories determined by their objects?
mathoverflow.net

19
Which colimits commute with which limits in the category of sets?
mathoverflow.net

19
Is Lie group cohomology determined by restriction to finite subgroups?
mathoverflow.net

19
Category theory for a set/model theorist
mathoverflow.net

18
Is there a notion of polynomial ring in "one half variable"?
mathoverflow.net

18
Monoidal categories whose tensor has a left adjoint
mathoverflow.net

17
Proof that a Cartesian category is monoidal
mathoverflow.net

17
Responsive Design Themes - What can sites customize and how can they get changes implemented?
meta.stackexchange.com

16
Do there exist acyclic simple groups of arbitrarily large cardinality?
mathoverflow.net

15
Are categories special, foundationally?
mathoverflow.net

15
Is every abelian group a colimit of copies of Z?
mathoverflow.net

15
Uniqueness of dualizing objects
mathoverflow.net

15
Which algebraic theories are co-sites?
mathoverflow.net

14
Is there a large colimit-sketch for topological spaces?
mathoverflow.net

14
Has the Isbell–Freyd criterion ever been used to check that a category is concretisable?
mathoverflow.net

13
What is the coskeleton tower of a quasi-category?
mathoverflow.net

13
On structures that are not submitted to compatibility conditions
mathoverflow.net

12
What is the homotopy category of the sphere spectrum?
mathoverflow.net

12
When the definition of a set starts to matter in category theory
mathoverflow.net

12
Are there examples of non-orientable manifolds in nature?
mathoverflow.net

12
Parodies of abstruse mathematical writing
mathoverflow.net

12
Whitehead for maps
mathoverflow.net

12
Books you would like to read (if somebody would just write them...)
mathoverflow.net

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