Skip to main content
Phil's user avatar
Phil's user avatar
Phil's user avatar
Phil
  • Member for 7 years, 4 months
  • Last seen this week
11 votes
3 answers
44k views

Can endpoints be local minimum?

5 votes
1 answer
587 views

Torus removed two points is homotopy equivalent to wedge sum of three circles

4 votes
1 answer
247 views

Homomorphism of Group Object: Are all the axioms necessary?

4 votes
1 answer
249 views

All possible tournament pairing such that you get no pair from the same group.

4 votes
1 answer
236 views

Join/slice adjunction and lifting problems

4 votes
1 answer
2k views

Understanding Universal Property and Universal Element (from Category Theory in Context, Riehl)

3 votes
1 answer
432 views

Prove universal morphism is unique up to unique isomorphism.

3 votes
1 answer
203 views

Lemma 4.1.3 in Category Theory in Context: Adjoint Functors

3 votes
1 answer
177 views

Fibrant Replacement Functor: its action on morphisms

3 votes
0 answers
199 views

Dummit and Foote Abstract Algebra: Chapter 12.1 Lemma 8

3 votes
2 answers
647 views

Measure on the power set of the natural number

3 votes
0 answers
425 views

Evaulate $\lim_{n \to \infty} \int_0^\infty ne^{-nx} \sin(1/x)dx$

3 votes
1 answer
52 views

What's an example of a function $f \colon (0,\infty) \to (0,\infty)$ with $f' \to 0$ and $\frac{1}{f}$ is integrable.

2 votes
0 answers
50 views

Let $U(x) = \exp(\frac{x}{1-x})$. For what function $f$ do we have $\lim\limits_{t \to 1} \frac{U(t+xf(t))}{U(t)} = e^x\,$ for all $x\;?$

2 votes
0 answers
41 views

Game theory: Help with understanding the proof that any finite, strictly competitve game of perfect information without chance moves has a value

2 votes
0 answers
23 views

Proof verification: proof with restricted function

2 votes
1 answer
393 views

Proving f is onto given if $g \circ f = h \circ f$, then g = h

2 votes
2 answers
539 views

Connected Component of a simplicial set

2 votes
1 answer
87 views

Riehl 2.2 vii: Path functor and Yoneda Lemma

2 votes
1 answer
465 views

Persistent Homology: Birth and death of cycles

2 votes
1 answer
563 views

Optimal Transport and Entropic Regularization

2 votes
1 answer
125 views

Restriction of $T$-invariant measure is $T$-invariant.

2 votes
1 answer
144 views

Durrett Probability 5th edition: Theorem 2.3.7

2 votes
0 answers
179 views

Proof Verification: Only contractible discrete space is the one point space

2 votes
0 answers
64 views

when can we assume without loss of generality that p(x) is monic.

2 votes
1 answer
282 views

Set of units in localization of $R$

1 vote
0 answers
42 views

If $g(a) = 0$, then $g$ takes unit disk to unit disk: conformal self map of unit disk

1 vote
1 answer
350 views

Argument Principle: roots of $z^6+9z^4+z^3+2z+4$

1 vote
0 answers
130 views

Understanding Covering Spaces of $S^1 \vee S^1$

1 vote
1 answer
768 views

Understanding Cayley-Hamilton Theorem for Modules