New posts in differential-geometry

Redundance of the Smoothness of the Inversion Map in the Definition of a Lie Group.

How to handle the differential of a vector field, ${\rm d}X:TM\to TTM$, in terms of (equivalence classes of) curves?

How to show the dimensionality of a tangent space defined via equivalence classes of curves?

Deriving calculation formulas for torsion and curvature

Picture behind $SO(3)/SO(2)\simeq S^2$

Lie derivative "commutes" with pullback by time dependent diffeomorphisms

Coordinate free proof that curvature is the "square" of the connection

uniqueness of the smooth structure on a manifold obtained by gluing

Is anyone talking about "ball bundles" of metric spaces?

Wedge product and change of variables

set of almost complex structures on $\mathbb R^4$ as two disjoint spheres

Homework: closed 1-forms on $S^2$ are exact.

Computing cohomology of hypersurface

Geometric and topological ways to define intersection number

Why Mathematicians and Physicists Approach Integration on Manifolds Differently?

Geometric interpretation of Laplace's formula for determinants

Abstract Smooth Manifolds vs Embedded Smooth Manifolds

Is there a way to relate convexity to Gaussian curvature?

Existence of closed, non self-intersecting geodesics on compact manifolds

Topology of "degenerate spectrum submanifold" in the space of hermitian matrices