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etale fundamental group of affine space minus the origin

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#algebraic-geometry #fundamental-groups
170
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The difference between $\mathbb{Z}\times\mathbb{Z}$ and $\mathbb{Z}*\mathbb{Z}$?

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#group-theory #algebraic-topology #fundamental-groups
97
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Equalities Between Induced Homomorphisms of Fundamental Groups

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#general-topology #fundamental-groups
149
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Universal Cover of $SO^+(2,4)$

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#algebraic-topology #lie-groups #fundamental-groups
495
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Closed orientable $n$-manifold $X$, there's a map $f: S^n \to X$ of nonzero degree, $n > 1$, is $\pi_1(X)$ finite?

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#algebraic-topology #manifolds #homology-cohomology #fundamental-groups
2k
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Fundamental group, homology of the complement of the "figure eight" knot in $S^3$?

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#algebraic-topology #homology-cohomology #fundamental-groups #knot-theory
172
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Noncontractible loop in $\operatorname{SL}(2,\mathbb{C})$?

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#algebraic-topology #lie-groups #fundamental-groups
2.6k
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Many questions about a Klein bottle.

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#general-topology #algebraic-topology #homology-cohomology #fundamental-groups
62
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Fundamental group of a space with no one cell?

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#general-topology #algebraic-topology #fundamental-groups
597
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Computing the fundamental group of 1-skeletons

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#algebraic-topology #fundamental-groups
9.8k
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Covering spaces of $S^1 \vee S^1$.

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#abstract-algebra #general-topology #algebraic-topology #geometric-topology #fundamental-groups
220
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Two questions on tunnel numbers of knots.

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#general-topology #algebraic-topology #fundamental-groups #knot-theory
403
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Another cell decomposition of Klein bottle that gives another presentation for $\pi_1$ of Klein bottle

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#general-topology #algebraic-topology #fundamental-groups
132
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Fundamental group of the torus using the edge group

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#algebraic-topology #fundamental-groups
103
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Injective homomorphism of $\pi_1$ of genus $3$ surface to $\pi_1$ of genus $2$ surface.

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#general-topology #surfaces #fundamental-groups

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