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Related papers: Absolutely exotic compact 4-manifolds

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We prove a localization theorem for exotic diffeomorphisms, showing that every diffeomorphism of a compact simply-connected 4-manifold that is isotopic to the identity after stabilizing with one copy of $S^2 \times S^2$, is smoothly…

Geometric Topology · Mathematics 2026-02-27 Vyacheslav Krushkal , Anubhav Mukherjee , Mark Powell , Terrin Warren

The aim of this paper is to produce infinite exotic structures on smooth closed oriented $4-$manifolds with fundamental group isomorphic to the infinite dihedral group, assuming that $b_2^+$ and $b_2^-$ are at least $12$.

Geometric Topology · Mathematics 2026-03-19 Simone Tagliente

We study smooth, proper embeddings of noncompact surfaces in 4-manifolds, focusing on exotic planes and annuli, i.e., embeddings pairwise homeomorphic to the standard embeddings of R^2 and R^2-int D^2 in R^4. We encounter two uncountable…

Geometric Topology · Mathematics 2025-01-08 Robert E. Gompf

For every integer $k\geq 2$, we construct infinite families of mutually nondiffeomorphic irreducible smooth structures on the topological $4$-manifolds $(2k-1)(S^2\times S^2)$ and $(2k-1)(\CP#\CPb)$, the connected sums of $2k-1$ copies of…

Geometric Topology · Mathematics 2015-05-19 Anar Akhmedov , B. Doug Park

Every exotic pair in 4-dimension is obtained each other by twisting a {\it cork} or {\it plug} which are codimension 0 submanifolds embedded in the 4-manifolds. The twist was an involution on the boundary of the submanifold. We define cork…

Geometric Topology · Mathematics 2012-01-31 Motoo Tange

In this article, we give new means of constructing and distinguishing closed exotic four-manifolds. Using Heegaard Floer homology, we define new closed four-manifold invariants that are distinct from the Seiberg--Witten and Bauer--Furuta…

Geometric Topology · Mathematics 2023-07-18 Adam Simon Levine , Tye Lidman , Lisa Piccirillo

We produce examples of pairwise non-diffeomorphic closed irreducible 4-manifolds with non-trivial free abelian fundamental group of rank less than three and small Euler characteristic. These exotic smooth structures become standard after…

Geometric Topology · Mathematics 2024-10-10 Valentina Bais , Rafael Torres , Daniele Zuddas

We introduce a method to detect exotic surfaces without explicitly using a smooth 4-manifold invariant or an invariant of a 4-manifold-surface pair in the construction. Our main tools are two versions of families (Seiberg-Witten)…

Geometric Topology · Mathematics 2024-09-12 Hokuto Konno , Abhishek Mallick , Masaki Taniguchi

We construct an infinite family of mutually non-diffeomorphic irreducible smooth structures on the topological 4-manifold $S^2 \times S^2$.

Geometric Topology · Mathematics 2015-03-17 Anar Akhmedov , B. Doug Park

We construct an infinite order cork (W,f), which means that W is a smooth compact contractible 4-manifold with Stein structure, and f is a self diffeomorphism of the boundary of W, such that the n-fold composition maps f^{n}=f o f o... o f…

Geometric Topology · Mathematics 2014-10-07 Selman Akbulut

We show that, for each integer n, there exist infinitely many pairs of n-framed knots representing homeomorphic but non-diffeomorphic (Stein) 4-manifolds, which are the simplest possible exotic 4-manifolds regarding handlebody structures.…

Geometric Topology · Mathematics 2017-09-29 Kouichi Yasui

We construct an example of a cork that remains exotic after taking a connected sum with $S^2 \times S^2$. Combined with a work of Akbulut-Ruberman, this implies the existence of an exotic pair of contractible 4-manifolds which remains…

Geometric Topology · Mathematics 2024-09-18 Sungkyung Kang

We give several criteria on a closed, oriented 3-manifold that will imply that it is the boundary of a (simply connected) 4-manifold that admits infinitely many distinct smooth structures. We also show that any weakly fillable contact…

Geometric Topology · Mathematics 2021-11-19 John B. Etnyre , Hyunki Min , Anubhav Mukherjee

In this paper, we investigate existence of inequivalent smooth structures on closed smooth non-orientable 4-manifolds building upon results of Akbulut, Cappell-Shaneson, Fintushel-Stern, Gompf, and Stolz. We add to the number of known…

Geometric Topology · Mathematics 2014-08-15 Rafael Torres

A cork is a smooth, contractible, oriented, compact 4-manifold $W$ together with a self-diffeomorphism $f$ of the boundary 3-manifold that cannot extend to a self-diffeomorphism of $W$; the cork is said to be strong if $f$ cannot extend to…

Geometric Topology · Mathematics 2020-08-28 Kyle Hayden , Lisa Piccirillo

We show that any finitely presented group with an index two subgroup is realized as the fundamental group of a closed smooth non-orientable four-manifold that admits an exotic smooth structure, which is obtained by performing a Gluck twist.…

Geometric Topology · Mathematics 2025-08-27 Rafael Torres

We describe a collection of constructions which illustrate a panoply of ``exotic'' smooth 4-manifolds.

Geometric Topology · Mathematics 2007-05-23 Ronald Fintushel , Ronald J. Stern

The purpose of this article is twofold. First we outline a general construction scheme for producing simply-connected minimal symplectic 4-manifolds with small Euler characteristics. Using this scheme, we illustrate how to obtain…

Geometric Topology · Mathematics 2014-02-26 Anar Akhmedov , R. Inanc Baykur , B. Doug Park

There are many theorems in the differential geometry literature of the following sort. Let M be a complete Riemannian manifold with some conditions on various curvatures, diameters, volumes, etc. Then M is homotopy equivalent to a finite CW…

Differential Geometry · Mathematics 2012-12-07 Laurence R. Taylor

In this article, we construct infinitley many simply connected, nonsymplectic and pairwise nondiffeomorphic 4-manifolds starting from E(n) and applying the sequence of knot surgery, ordinary blowups and rational blowdown. We also compute…

Geometric Topology · Mathematics 2007-05-23 Anar Akhmedov