Euler characteristic, what is the precise relationship between $\chi(V)$, $\chi(V')$, and $\chi(V'')$?
45958
Proof that the Euler characteristic is additive
129481
About the term $-\nabla_{[u,v]}w$ in the definition of Riemann curvature tensor
27629
How to prove that $S^{2n+1}/S^1$ is homeomorphic to $\mathbb CP^n$ under a given identification
136506
Help with an integral for: If U has a $\chi^2$ distribution with v df, find E(U) and V(U)
9926
About the relation between $\int_{0}^{\infty}\frac{\cosh((\alpha-\beta)x)}{(\cosh(x))^{\alpha+\beta }} \,dx$ and $B(\alpha,\beta)$
52305
Is there a general relation between $a/b$ and $(a+c)/(b+c)$ where $a,b,c > 0 $?
156727
A step in the proof of Characterization of $W^{1,\infty}$
81375
Why does $V(I(S))=\overline{S}$?
157599
what is the meaning of $F_\sigma$ and $G_\delta?$
99120
Integral representation of Euler's constant
12112
What is known about the pattern for $\zeta(2n+1)$?
65096
$\chi(G)+\chi(G')\leq n+1$
742
How to prove Euler's formula: $e^{i\varphi}=\cos(\varphi) +i\sin(\varphi)$?
133756
Geometric interpretation of $\det(A^T) = \det(A)$
35337
Problem in notation: $(\vec{v}\cdot\vec{\nabla})\vec{v}$ versus $L_v(\vec{v})$
100899
Coefficients of the characteristic polynomial
125734
Has anyone talked themselves into understanding Euler's identity a bit?