Deformation Retract and surjectivity
127627
Does $\sum^{\infty}_{n=1} n/(n-1)!$ converge to something?
16610
Surjectivity of a map from a space to itself
143269
Existence of area-preserving diffeomorphism between two sets in $\mathbb{R}^2$
92907
UV coordinates on a deformed plane
88857
Prove that Gauss map on M is surjective
115088
Surjective morphism of affine varieties and dimension
25874
Showing that a certain map is not flat by explicit counterexample
93471
Space of homeomorphisms Homeo$(S^1)$ of $S^1$ deformation retracts onto $O(2)$
34293
Homeomorphism between pairs of letters
91878
Homeomorphism of the Disk
74607
Variation of the metric with respect to the metric
30597
Morphism that is not a mapping
154142
Finding a specific basis for an endomorphism
133083
Injectivity and surjectivity of a recursive function
30626
The mapping cylinder of CW complex
112607
Why is homology invariant under deformation retraction/homotopy equivalence?
93776
Bijective mapping between $\mathbb{R}^2$ and $\mathbb{R}$?