Preface | p. v |
Lectures on Gromov-Witten Invariants of Orbifolds | p. 1 |
Introduction | p. 1 |
What This Is | p. 1 |
Introspection | p. 1 |
Where Does All This Come From? | p. 2 |
Acknowledgements | p. 2 |
Gromov-Witten Theory | p. 2 |
Kontsevich's Formula | p. 2 |
Set-Up for a Streamlined Proof | p. 3 |
The Space of Stable Maps | p. 7 |
Natural Maps | p. 8 |
Boundary of Moduli | p. 9 |
Gromov-Witten Classes | p. 10 |
The WDVV Equations | p. 11 |
Proof of WDVV | p. 12 |
About the General Case | p. 15 |
Orbifolds/Stacks | p. 16 |
Geometric Orbifolds | p. 16 |
Moduli Stacks | p. 17 |
Where Do Stacks Come Up? | p. 19 |
Attributes of Orbifolds | p. 19 |
Etale Gerbes | p. 20 |
Twisted Stable Maps | p. 21 |
Stable Maps to a Stack | p. 21 |
Twisted Curves | p. 22 |
Twisted Stable Maps | p. 23 |
Transparency 25: The Stack of Twisted Stable Maps | p. 24 |
Twisted Curves and Roots | p. 25 |
Valuative Criterion for Properness | p. 27 |
Gromov-Witten Classes | p. 29 |
Contractions | p. 29 |
Gluing and Rigidified Inertia | p. 29 |
Evaluation Maps | p. 31 |
The Boundary of Moduli | p. 32 |
Orbifold Gromov-Witten Classes | p. 32 |
Fundamental Classes | p. 34 |
WDVV, Grading and Computations | p. 35 |
The Formula | p. 35 |
Quantum Cohomology and Its Grading | p. 36 |
Grading the Rings | p. 38 |
Examples | p. 38 |
Other Work | p. 41 |
Mirror Symmetry and the Crepant Resolution Conjecture | p. 42 |
The Legend of String Cohomology: Two Letters of Maxim Kontsevich to Lev Borisov | p. 43 |
The Legend of String Cohomology | p. 43 |
The Archaeological Letters | p. 44 |
References | p. 46 |
Lectures on the Topological Vertex | p. 49 |
Introduction and Overview | p. 49 |
Chern-Simons Theory | p. 51 |
Basic Ingredients | p. 51 |
Perturbative Approach | p. 55 |
Non-Perturbative Solution | p. 61 |
Framing Dependence | p. 68 |
The 1/N Expansion in Chern-Simons Theory | p. 70 |
Topological Strings | p. 73 |
Topological Strings and Gromov-Witten Invariants | p. 74 |
Integrality Properties and Gopakumar-Vafa Invariants | p. 76 |
Open Topological Strings | p. 77 |
Toric Geometry and Calabi-Yau Threefolds | p. 79 |
Non-Compact Calabi-Yau Geometries: An Introduction | p. 79 |
Constructing Toric Calabi-Yau Manifolds | p. 81 |
Examples of Closed String Amplitudes | p. 87 |
The Topological Vertex | p. 89 |
The Gopakumar-Vafa Duality | p. 89 |
Framing of Topological Open String Amplitudes | p. 89 |
Definition of the Topological Vertex | p. 91 |
Gluing Rules | p. 93 |
Explicit Expression for the Topological Vertex | p. 95 |
Applications | p. 96 |
Symmetric Polynomials | p. 99 |
References | p. 100 |
Floer Cohomology with Gerbes | p. 105 |
Floer Cohomology | p. 106 |
Newton's Second Law | p. 106 |
The Hamiltonian Formalism | p. 107 |
The Arnold Conjecture | p. 108 |
Floer's Proof | p. 108 |
Morse Theory | p. 109 |
Bott-Morse Theory | p. 110 |
Morse Theory on the Loop Space | p. 110 |
Re-Interpretation #1: Sections of the Symplectic Mapping Torus | p. 112 |
Re-Interpretation #2: Two Lagrangian Submanifolds | p. 113 |
Product Structures | p. 114 |
The Finite-Order Case | p. 115 |
Givental's Philosophy | p. 115 |
Gerbes | p. 117 |
Definition of Stacks | p. 117 |
Examples of Stacks | p. 118 |
Morphisms and 2-Morphisms | p. 118 |
Definition of Gerbes | p. 120 |
The Gerbe of Liftings | p. 121 |
The Lien of a Gerbe | p. 122 |
Classification of Gerbes | p. 123 |
Allowing the Base Space to Be a Stack | p. 123 |
Definition of Orbifolds | p. 124 |
Twisted Vector Bundles | p. 124 |
Strominger-Yau-Zaslow | p. 125 |
Orbifold Cohomology and Its Relatives | p. 126 |
Cohomology of Sheaves on Stacks | p. 126 |
The Inertia Stack | p. 127 |
Orbifold Cohomology | p. 128 |
Twisted Orbifold Cohomology | p. 129 |
The Case of Discrete Torsion | p. 129 |
The Fantechi-Gottsche Ring | p. 130 |
Twisting the Fantechi-Gottsche Ring with Discrete Torsion | p. 131 |
Twisting It with an Arbitrary Flat Unitary Gerbe | p. 131 |
The Loop Space of an Orbifold | p. 132 |
Addition of the Gerbe | p. 134 |
The Non-Orbifold Case | p. 135 |
The Equivariant Case | p. 135 |
A Concluding Puzzle | p. 136 |
Notes on the Literature | p. 137 |
Notes to Lecture 1 | p. 137 |
Notes to Lecture 2 | p. 139 |
Notes to Lecture 3 | p. 140 |
The Moduli Space of Curves and Gromov-Witten Theory | p. 143 |
Introduction | p. 143 |
The Moduli Space of Curves | p. 145 |
Tautological Cohomology Classes on Moduli Spaces of Curves, and Their Structure | p. 154 |
A Blunt Tool: Theorem * and Consequences | p. 173 |
Stable Relative Maps to P[superscript 1] and Relative Virtual Localization | p. 177 |
Applications of Relative Virtual Localization | p. 186 |
Towards Faber's Intersection Number Conjecture 3.23 via Relative Virtual Localization | p. 190 |
Conclusion | p. 194 |
References | p. 194 |
List of Participants | p. 199 |
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