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15
Math.TechQA.Club
2026-03-30 10:16:32
413
Views
Euler characteristic of Seifert surfaces
Published on
30 Mar 2026 - 10:16
#surfaces
#geometric-topology
#knot-theory
90
Views
How to reduce the rank of first-homology of compact surface by one
Published on
27 Oct 2020 - 18:32
#algebraic-topology
#differential-topology
#homology-cohomology
#surfaces
#geometric-topology
278
Views
Tilings of the plane and quotient spaces
Published on
25 Mar 2026 - 21:48
#topological-groups
#geometric-topology
#symmetry
#tiling
#tessellations
429
Views
G torsor v.s. Principal G-bundle
Published on
30 Mar 2026 - 13:37
#differential-geometry
#algebraic-geometry
#algebraic-topology
#geometric-topology
#fiber-bundles
472
Views
Continuous groups that are not or do not involve Lie groups?
Published on
03 Nov 2020 - 0:57
#differential-geometry
#manifolds
#differential-topology
#lie-groups
#geometric-topology
146
Views
Can we see both sides of faces of 4D tesseract from 3D?
Published on
27 Mar 2026 - 21:35
#geometry
#geometric-topology
#low-dimensional-topology
22
Views
how to calculate the 3D cartesin position of a point based on lat and long?
Published on
04 Nov 2020 - 7:57
#geometric-topology
276
Views
What does the commutator subgroup of a knot group "look like"?
Published on
28 Mar 2026 - 0:48
#geometric-topology
#knot-theory
#low-dimensional-topology
112
Views
No proper dense open subsets of $\mathbb{R}^n$?
Published on
06 Nov 2020 - 15:42
#general-topology
#geometric-topology
641
Views
Definition of Cell Decomposition?
Published on
28 Mar 2026 - 14:53
#general-topology
#definition
#geometric-topology
#cw-complexes
234
Views
Explicit realization of Eilenberg-MacLane spaces and TOP/PL
Published on
26 Mar 2026 - 6:05
#algebraic-topology
#geometric-topology
#classifying-spaces
#eilenberg-maclane-spaces
111
Views
Let f be an embedding of disk $D$ in Real Projective plane $P$. Show that $P- int(f(D))$ is homeomorphic to Mobius strip.
Published on
09 Nov 2020 - 21:45
#general-topology
#algebraic-topology
#geometric-topology
67
Views
Relations between $K_3$ complex surface and $\mathbb{CP}^2$
Published on
09 Nov 2020 - 23:09
#differential-geometry
#algebraic-topology
#differential-topology
#complex-geometry
#geometric-topology
72
Views
all unoriented bordism groups are $\mathbb{Z}/2$s
Published on
26 Mar 2026 - 4:30
#differential-geometry
#algebraic-topology
#differential-topology
#geometric-topology
#cobordism
115
Views
Usefulness of compact boundary proving uniqueness in gluing smooth manifolds
Published on
27 Mar 2026 - 22:31
#algebraic-topology
#differential-topology
#smooth-manifolds
#geometric-topology
#manifolds-with-boundary
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