What is a non-vanishing tangent vector field?
120100
Hairy Ball Theorem: homotopy from the identity to the antipodal map
5303
isolated non-normal surface singularity
47906
Can two streamlines in a fluid be tangential to each other not crossing each other?
84385
Implicit differentiation
150687
Is there a concise term for a vector field where each component is a function of its own variable?
49720
Why is the tangent of an angle called that?
46358
geometric interpretation of $\vec v \cdot \operatorname{curl} \vec v = 0 $
151575
Differentiable bijection $f:\mathbb{R} \to \mathbb{R}$ with nonzero derivative whose inverse is not differentiable
147876
Find $F$-related vector fields on $M\times N$, where $F(x)=(x, f(x))$
23399
Nature of spacetime 4-vector and tangent space?
129481
About the term $-\nabla_{[u,v]}w$ in the definition of Riemann curvature tensor
26379
What is non-manifold geometry?
121830
The commutators of related vector fields are related
140923
For any point outside of a circle, is there ever only one tangent to the circle that passes through the point?
109027
example of a non differentiable manifold
122121
Is there a vector space that cannot be an inner product space?
98800
Do local flows of left-invariant vector fields satisfy $\Phi_X^t\circ L_x=L_x\circ \Phi_X^t$?