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21
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4
When does the quotient of a manifold with boundary become a manifold?
4
Doubts in the fundamental theorem of algebra using Galois theory
3
Intuition behind topological spaces
3
Examples of dictionaries between two distinct fields of mathematics (or between “differents” structures of math).
3
Tangent spaces of affine algebraic varieties at singular points
2
Tensor algebra of Dg-algebra
2
Restriction map on a compact orientable manifold without a boundary.
2
4D tangent planes
2
Triviality/non-triviality of line/circle bundle over $S^3$
2
Holomorphic forms and harmonic forms
1
Question about covering spaces concerning a one-sheeted covering map
1
Free object is a coproduct: $F_{A\cup B}\cong F_A \coprod F_B$
1
Commutator subgroup and cyclic normal subgroup
1
Getting a derivation from a path of automorphisms of an algebra
1
Show that the group $\mathrm{GL}_2(\mathbb{F}_5)$ has order 480
1
Retraction from torus to linked circle
0
Steps missing in the proof $[L:K]=n!\ \Longrightarrow \ f\text{ is irreducible}$
0
a ideal of the ring of regular functions of an affine variety.
0
Classical Mechanics and the Hamiltonian
0
Riemann sphere and Maps
-1
Are strongly close maps homotopic?
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