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Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

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Page 1: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 2: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 3: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact forms

Page 4: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact structures

Page 5: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact structures

Page 6: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 7: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 8: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 9: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact topology

Page 10: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact topology

Page 11: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Fundamental dichotomy:

Tight versus overtwisted

Page 12: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Overtwisted disk

Page 13: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Fundamental dichotomy is a tautology

Page 14: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Fundamental dichotomy is a tautology

Page 15: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 16: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

overtwisted

Page 17: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

tight overtwisted

Page 18: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Classification of overtwisted

contact structures

Page 19: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 20: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 21: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 22: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Classification of overtwisted

contact structures

Page 23: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Classification of tight contact

structures?

Page 24: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 25: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 26: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Dichotomy between

universally tight

and

virtually overtwisted

(tight) contact structures

Page 27: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 28: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 29: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 30: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 31: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The dichotomy between universally tight and

virtually overtwisted contact structures

Page 32: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The dichotomy between universally tight and

virtually overtwisted contact structures

Page 33: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The dichotomy between universally tight and

virtually overtwisted contact structures

Page 34: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Contact structures

tight overtwisted

universally tight virtually overtwisted

Page 35: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

MILNOR FILLABLE CONTACT

STRUCTURES

Page 36: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Complex surface singularities

Page 37: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The link of a singularity

Page 38: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The link of a singularity

Page 39: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

The link of a singularity

Page 40: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

An example of a link of a singularity

Page 41: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Canonical contact structure

Page 42: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Canonical contact structure

Page 43: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Milnor fillable

Page 44: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Topological characterization

Page 45: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 46: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Our main result

Page 47: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Our main result

Page 48: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Our main result

Page 49: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

What was known?

Page 50: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

What was known?

Page 51: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Milnor fillable universally tight

Stein fillable

strongly symplectically fillable

weakly symplectically fillable

tight

There are no other implications!

Page 52: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 53: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 54: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 55: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 56: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 57: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 58: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 59: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 60: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 61: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 62: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 63: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 64: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Proof of the corollary

Page 65: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Outline of the proof:

Page 66: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Outline of the proof:

Page 67: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Outline of the proof:

Page 68: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 69: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 70: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 71: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 72: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 73: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted

Another approach ?

Page 74: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted
Page 75: Contact forms - media.qgm.au.dkmedia.qgm.au.dk/wsgaugetheory/Wednesday-3.pdf · virtually overtwisted contact structures. The dichotomy between universally tight and virtually overtwisted