# Questions tagged [gt.geometric-topology]

Topology of cell complexes and manifolds, classification of manifolds (e.g. smoothing, surgery), low dimensional topology (e.g. knot theory, invariants of 4-manifolds), embedding theory, combinatorial and PL topology, geometric group theory, infinite dimensional topology (e.g. Hilbert cube manifolds, theory of retracts).

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### Trajectory definition using constrained projections on unknown surface

**3**

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### What is the connection between $\mathrm{AdS}_2$ and the hyperbolic plane $\mathbb{H}^2$?

**6**

**1**answer

### unlinking in 5 dimensions

**5**

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### Finitely generated nilpotent groups as cusp groups

**2**

**1**answer

### Distinguishing Square Knot and Granny Knot using Quandles

**1**

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### Maximum number of ways of splitting a set of points with an hyperplane

**1**

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### Quadrilateral fundamental domain

**7**

**3**answers

### Wildness of codimension 1 submanifolds of euclidean space

**7**

**1**answer

### To find a point in Teichmüller space or measured foliation, how many lengths of curves do you need?

**14**

**1**answer

### Simplicial set of permutations

**4**

**2**answers

### Tiling of genus 2 surface by 8 pentagons

**3**

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### Diffeomorphism classification of Grassmannian manifolds

**1**

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### Is every $(n-1)$-connected $n$-manifold embeddable in $\mathbb{R}^{n+1}$ homeomorphic to $\mathbb{S}^{n}$? [migrated]

**2**

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### Is this a typo in Ihara's “On discrete subgroups of the two by two projective linear group over p-adic fields”?

**12**

**3**answers