The lecture notes are part of a book in progress by Professor Etingof. Please refer to the calendar section for reading assignments for this course.

1.1 Classical Mechanics

1.2 Classical Field Theory

1.3 Brownian Motion

1.4 Quantum Mechanics

1.5 Quantum Field Theory

2.1 The Steepest Descent Formula

2.2 Stationary Phase Formula

2.3 Non-analyticity of I(*h*) and Borel Summation

2.4 Application of Steepest Descent

2.5 Multidimensional Versions of Steepest Descent and Stationary Phase

3.1 Wick's Theorem

3.2 Feynman's Diagrams and Feynman's Theorem

3.3 Another Version of Feynman's Theorem

3.4 Proof of Feynman's Theorem

3.5 Sum Over Connected Diagrams

3.6 Loop Expansion

3.7 Nonlinear Equations and Trees

3.8 Counting Trees and Cayley's Theorem

3.9 Counting Trees with Conditions

3.10 Counting Oriented Trees

3.11 1-particle Irreducible Diagrams and the Effective Action

3.12 1-particle Irreducible Graphs and the Legendre Transform

4.1 Fat Graphs

4.2 Matrix Integrals in Large *N* limit and Planar Graphs

4.3 Integration Over Real Symmetric Matrices

4.4 Application to a Counting Problem

4.5 Hermite Polynomials

4.6 Proof of Theorem 4.7

5.1 Euler Characteristics of Groups

5.2 The Mapping Class Group

5.3 Construction of the Complex *Y *5.4 Enumeration of Cells in

6.1 The Number of Planar Gluings

6.2 Proof of Theorem 6.1

7.1 The Path Integral in Quantum Mechanics

7.2 Wick Rotation

7.3 Definition of Euclidean Correlation Functions

7.4 Connected Green's Functions

7.5 The Clustering Property

7.6 The Partition Function

7.7 1-particle Irreducible Green's Functions

7.8 Momentum Space Integration

7.9 The Wick Rotation in Momentum Space

7.10 Quantum Mechanics on the Circle

7.11 The Massless Case

7.12 Circle Valued Quantum Mechanics

7.13 Massless Quantum Mechanics on the Circle

8.1 Hamilton’s Equations in Classical Mechanics

8.2 Hamiltonians in Quantum Mechanics

8.3 Feynman-Kac Formula

8.4 Proof of the Feynman-Kac Formula in the Free Case

8.5 Proof of the Feynman-Kac Formula (General Case)

8.6 The Massless Case

9.1 Bosons and Fermions

9.2 Supervector Spaces

9.3 Supermanifolds

9.4 Supermanifolds and Vector Bundles

9.5 Integration on Superdomains

9.6 The Berezinian of a Matrix

9.7 Berezin’s Change of Variable Formula

9.8 Integration on Supermanifolds

9.9 Gaussian Integrals in an Odd Space

9.10 The Wick Formula in the Odd Case

10.1 Feynman Calculus in the Supercase

10.2 Fermionic Quantum Mechanics

10.3 Super Hilbert Spaces

10.4 The Hamiltonian Setting for Fermionic Quantum Mechanics

11.1 Minkowski and Euclidean Space

11.2 Free Scalar Bosons

11.3 Spinors

11.4 Fermionic Lagrangians

11.5 Free Fermions