User Diane Vanderwaif - Mathematics Stack Exchange

Diane Vanderwaif

Member for 10 years, 8 months
Last seen more than 8 years ago

5 Answers

Score Activity Newest

3 votes

Prove that any map $f\colon S^1 \to S^1$ mapping antipodal point to antipodal point has $\deg_2(f)=1$ by a direct computation.

answered Nov 24, 2014 at 19:28

2 votes

Accepted

Prove that if $u$ and $v$ do not lie on a common cycle then $od(u)≠od(v)$

answered Nov 9, 2014 at 22:54

1 vote

Accepted

Prove that if $G$ is an nontrivial connected graph with at most 2 bridges, then there exists an orientation $D$

answered Nov 5, 2014 at 16:42

1 vote

Accepted

Prove that $f$ map a neighborhood of $Z$ diffeomorphically on to a neighborhood of $f(Z)$( more detail)

answered Nov 24, 2014 at 21:51

0 votes

Accepted

Prove or disprove: if $G$ is a graph such that $\chi(G) \leq \chi(S_k)$ then $G$ is embedded in $S_k$

answered Mar 20, 2015 at 10:22