Alphabeta Math

Sublevel Deformation and the Handle Attachment Theorem

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1 · Prerequisites
2 · Logical flowchart

3 · Items

Definition

Closed sublevel and level set of a smooth function

Lemma

Normalized gradient crosses a compact regular band in controlled time

Theorem

Regular interval diffeomorphism

Corollary

Regular sublevels are diffeomorphic

Proposition

Deformation lemma for a critical point free slab

Definition

K handle core cocore attaching region and belt sphere

Definition

Attaching a smooth handle with corner rounding

Lemma

Smooth handle attachment is independent of corner rounding up to diffeomorphism

Lemma

Adapted descending field near a compact morse band

Lemma

Local critical-value lowering preserves the upper sublevel

Lemma

Local morse sublevel pair is a handle pair

Lemma

Descending flow identifies the local and global attaching regions

Theorem

One critical point handle attachment

Corollary

Unstable disk is the handle core

Corollary

One critical point cell attachment homotopy type

Lemma

Relative homology of the standard handle pair

Corollary

Relative homology of a single handle pair

Proposition

Simultaneous attachment at a morse critical value

Corollary

Index zero handles create components

Corollary

Index n handles cap boundary spheres

Remark

Compact critical band is the local handle theorem hypothesis

Sources