By András I. Stipsicz, Robert E. Gompf

ISBN-10: 0821809946

ISBN-13: 9780821809945

The earlier 20 years have introduced explosive development in 4-manifold thought. Many books are at present showing that procedure the subject from viewpoints resembling gauge concept or algebraic geometry. This quantity, even though, deals an exposition from a topological standpoint. It bridges the space to different disciplines and provides classical yet very important topological thoughts that experience now not formerly seemed within the literature. half I of the textual content provides the fundamentals of the idea on the second-year graduate point and provides an summary of present examine. half II is dedicated to an exposition of Kirby calculus, or handlebody conception on 4-manifolds. it truly is either straight forward and finished. half III bargains intensive a large diversity of themes from present 4-manifold examine. themes comprise branched coverings and the geography of advanced surfaces, elliptic and Lefschetz fibrations, $h$-cobordisms, symplectic 4-manifolds, and Stein surfaces. functions are featured, and there are over three hundred illustrations and various workouts with options within the publication.

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**Extra info for 4-Manifolds and Kirby Calculus (Graduate Studies in Mathematics, Volume 20)**

**Example text**

34 Let X be any space, and let ∗ ∈ X. Determine the mapping spaces map(S 0 , X) and map∗ (S 0 , X). In other words, give a complete description of these spaces in terms of X, and not including any mapping spaces. A special case of pointed mapping spaces that is very important is the set of pointed maps from S 1 to X; this particular mapping space is denoted Ω(X), and is called the loop space of X. 25, map∗ (X, Ω(Y )) ∼ = map∗ (S, Y ). for some pointed space S. Give an explicit description of the space S.

Every point x in the northern hemisphere is equivalent to exactly one point in the southern hemisphere. Another Description of CW Complexes. Each n-cell of a CW complex X has a corresponding map χ : Dn → X defined by the diagram Dn _ k Sn f Xn ‘ k jn i / k χ Dn+1 / Xn+1 This is called the characteristic map of the cell. 2 Jason Trowbridge’s idea. / X. 8 Let X be a CW complex. , it is a homeomorphism onto its image. The image of χ is called an open n-cell of X. (b) Show that X is the union of the interiors of its cells (we interpret the interior of a 0-cell to be the cell itself), and that those open cells are pairwise disjoint.

Alternatively, construct a natural isomorphism between the functors morC ( ? , P ) and morC ( ? , Q). Domains and Targets. Colimits C are defined in such a way that we are given information about morphisms C → Z; so colimits are domain-type constructions. Dually, limits are defined so that we have information about morphims Z → L; and hence limits are target-type constructions. 13 Show that the colimit of the empty diagram ∅ → C is an initial object in C. Show that the limit of the identity idC is an initial object in C.

### 4-Manifolds and Kirby Calculus (Graduate Studies in Mathematics, Volume 20) by András I. Stipsicz, Robert E. Gompf

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