About Poincaré-Hopf theorem: can we find and draw $v$ with only one zero on $S$?
91440
Existence of a vector field with one singularity on a surface
22842
The Interpretation of $|\psi|^2$ and the No-Clone Theorem
109767
Prove that three points are enough to draw/define one and only one circle
81375
Why does $V(I(S))=\overline{S}$?
42334
Does $\lambda$ $\mathbf u$ $= 0$ imply $\lambda = 0$ or $\mathbf u$ $= 0$?
154459
Constructing a HoTT proof term of 1≠0
114826
Zero Partials imply Constant Function Theorem or Proof
13899
Proof that $-v = (-1)*v$
110472
Existence of a Pivot Point in Euclidean Geometry
33891
If $\mathbf A$ and $\mathbf B$ are Hermitian, when does $\det(\mathbf A-\lambda\mathbf B)=0$ have only real roots?
4199
Evans PDE Problem 5.15: Poincaré inequality for functions with large zero set
68617
Show that an entire function that is real only on the real axis has at most one zero, without the argument principle
91482
Is there a short proof for the Intermediate Value Theorem
76110
Proving that the zero vector is unique
122076
A one line proof that one is zero using Mathematica 10
116314
On-shell and off-shell transformations in Noether's theorem
92050
Poincaré's theorem about groups