4-Manifolds - download pdf or read online

By Selman Akbulut

ISBN-10: 0198784864

ISBN-13: 9780198784869

This publication offers the topology of soft 4-manifolds in an intuitive self-contained approach, built over a couple of years by means of Professor Akbulut. The textual content is aimed toward graduate scholars and makes a speciality of the educating and studying of the topic, giving a right away method of buildings and theorems that are supplemented by means of routines to assist the reader paintings in the course of the info no longer lined within the proofs.

The publication includes a hundred color illustrations to illustrate the tips instead of delivering long-winded and very likely doubtful reasons. Key effects were chosen that relate to the fabric mentioned and the writer has supplied examples of ways to examine them with the options built in past chapters.

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Extra resources for 4-Manifolds

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7) have special names: E8 and E10 . g. 8). 2 Self plumbing Using a method similar to that one above, we can plumb a disk bundle D ↪ E → S to itself. So the only difference is, when we locate ourselves on the boundary of D1 ×B1 = B 4 , we will see a link of thickened Hopf circles, identified with each other by a cylinder (S 1 × [0, 1]) × D 2 . This is equivalent to first attaching a 1-handle to B 4 (thickened point ×[0, 1]), followed by attaching a 2-handle to the connected sum of the two circles over the 1-handle (a tunnel).

Since every self diffeomorphism #s (S 1 × S 2 ) extends to a unique self diffeomorphism of #s (S 1 × B 3 ), the only way f ′ doesn’t extend to a diffeomorphism M − M ′ → N − N ′ is when N − N ′ is an exotic copy of #s (S 1 × B 3 ). The case of s = 0 is particularly interesting, since the only way the last extension problem M − M ′ → N − N ′ fails is when the 4-dimensional smooth Poincare conjecture fails (in examples this step usually goes through). Even in the cases of single 2-handle M = K r and N = Lr , extending a diffeomorphism f ∶ ∂(K r ) → ∂(Lr ) can be a difficult task without carving.

Kn . Then −M ⌣f N is represented by QΛ′′ where Λ′′ = Λ′ ⌣ {f (γ1 ), . . , f (γn )}. 1). In the special case of when M has no 3-handles, then clearly the framed link {f (γ1), . . , f (γn )} in ∂B 4 gives its upside down handlebody of M. 4-Manifolds. ©Selman Akbulut 2016. Published 2016 by Oxford University Press. 1 The manifold −M ⌣id M is called the double of M and denoted by D(M). So by the above, D(M) is a handlebody obtained from M by attaching 2-handles along the zero-framed dual circles of the 2-handles of M.

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4-Manifolds by Selman Akbulut

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