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Homology sphere - Wikipedia
The Poincaré homology sphere (also known as Poincaré dodecahedral space) is a particular example of a homology sphere, first constructed by Henri Poincaré. Being a spherical 3-manifold, it is the only homology 3-sphere (besides the 3-sphere itself) with a finite fundamental group. Its fundamental group is known … See more
In algebraic topology, a homology sphere is an n-manifold X having the homology groups of an n-sphere, for some integer $${\displaystyle n\geq 1}$$. That is,
and See more• The Rokhlin invariant is a $${\displaystyle \mathbb {Z} /2\mathbb {Z} }$$-valued invariant of homology 3-spheres.
• The See more• A 16-Vertex Triangulation of the Poincaré Homology 3-Sphere and Non-PL Spheres with Few Vertices by Anders Björner and Frank H. Lutz
• Lecture by David Gillman on The best picture of Poincare's homology sphere See moreIf A is a homology 3-sphere not homeomorphic to the standard 3-sphere, then the suspension of A is an example of a 4-dimensional See more
• Dror, Emmanuel (1973). "Homology spheres". Israel Journal of Mathematics. 15 (2): 115–129. doi:10.1007/BF02764597. MR 0328926. S2CID 189796498.
• Galewski, … See moreWikipedia text under CC-BY-SA license 3-sphere - Wikipedia
The 3-dimensional surface volume of a 3-sphere of radius r is
while the 4-dimensional hypervolume (the content of the 4-dimensional region, or ball, bounded by the 3-sphere) is
Every non-empty intersection of a 3-sphere with a three-dimensional hyperplane is a 2-sphere (unless the hyperplane is tangent to the 3-sphere, in which case the intersection is a single poin…Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 9 mins
- An important class of manifolds called Brieskorn manifolds are obtained as links of Brieskorn singularities. These include the Poincare homology sphere. These also have descriptions as Seifert manifolds.
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Title: Monopole Floer homology for rational homology 3-spheres
Sep 29, 2008 · We give a new construction of monopole Floer homology for spin-c rational homology 3-spheres. As applications we define two invariants of certain smooth compact 4 …
Automorphic forms and rational homology 3–spheres 299 homology spheres comes from switching between non-compact covers of Bianchi manifolds and compact arithmetic quotients …
Homology 3-Spheres | SpringerLink
By an R-homology 3-sphere we will mean a closed oriented 3-manifold M such that H * (M, R) = H * (S 3, R). In dimension three, the concepts of topological, smooth, and PL manifolds coincide, …
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Title: On counting special Lagrangian homology 3-spheres
Jul 2, 1999 · We attempt to define a new invariant I of (almost) Calabi-Yau 3-folds M, by counting special Lagrangian rational homology 3-spheres N in M in each 3-homology class, with a …
[1605.08530] Integer homology 3-spheres admit irreducible ...
May 27, 2016 · We prove that the fundamental group of any integer homology 3-sphere different from the 3-sphere admits irreducible representations of its fundamental group in SL(2,C). For …
1 Homology 3-Spheres Let R be a commutative ring with an identity element. By an R-homology 3-sphere we will mean a closed oriented 3-manifold M such that H. (M, R) = H, (83 , R). In …
INSTANTON HOMOLOGY OF SEIFERT FIBRED HOMOLOGY THREE SPHERES RONALD FINTUSHEL and RONALD J. STERN [Received 4 October 1988—Revised 5 May 1989] 1. …
gt.geometric topology - Classification of homology 3-spheres ...
Jan 23, 2022 · If you wanted to enumerate every homology sphere, you could list elements of the Torelli group, and construct 3-manifolds, then throw away repeats by using some solution to …
Every homology 3-sphere can be represented as a framed link, in the sense of Kirby, of the following special type. There are k disjoint embeddings in S s of a genus one
For nullhomologous knots in rational homology 3–spheres with a trivial Alexander polynomial, we show that the Kricker lift of the Kontsevich integral and the Lescop equivariant invariant built …
Let (Σ,X,c) be a triple composed of a homology 3-sphere Σ, a compact smooth spin 4- V -manifold X with boundary ∂X ∼= Σ, and a V -spin c structure c on X .
Casson's Invariant for Oriented Homology Three-Spheres: An
In the spring of 1985, A. Casson announced an interesting invariant of homology 3-spheres via constructions on representation spaces. This invariant generalizes...
Title: The Seiberg-Witten theory of homology 3-spheres - arXiv.org
Mar 16, 1997 · Abstract: In this thesis we study the Seiberg-Witten theory of an oriented homology 3-sphere. The goal is to extract topological invariants - the Seiberg-Witten invariants - by …
general topology - Homotopy groups of integer homology 3 …
Sep 14, 2017 · Let $Y^3$ be a integer homology 3-sphere, i.e. $H_k(Y;\mathbb{Z}) = H_k(S^3;\mathbb{Z}), \forall k$, i.e. $$ H_0(Y;\mathbb{Z}) = H_3(Y;\mathbb{Z}) = \mathbb{Z} …
Why are invariants of Homology 3-Spheres interesting?
Jan 4, 2014 · Even with the Poincare conjecture solved, invariants of homology $3$-spheres are a good first step in the classification of all smooth $3$-manifolds - a classification which is …
In this paper we will give a general framework to construct invariants of homology spheres in a purely algebraic setting as functions out of the full Torelli group. We will show that the algebraic
Invariants of Homology 3-Spheres - Google Books
Sep 5, 2002 · Homology 3-sphere is a closed 3-dimensional manifold whose homology equals that of the 3-sphere. These objects may look rather special but they have played an …
Rapid traversal of vast chemical space using machine learning …
5 days ago · One hundred homology models of the activated D 2 R bound to agonist ligand (PD128907) were constructed using MODELLER 56 version 10.2 based on a cryo-EM …