Math 6120, Spring 2026 - Schedule

(Section numbers are from Stein-Shakarchi unless otherwise specified)

Week Topics
1 Jan 20

Jan 22

Intro; Complex Numbers §1.1

Complex differentiability and Cauchy-Riemann equations §1.2

2 Jan 27

Jan 29

Conformality; Power series §1.2

Complex line integrals §1.3

3 Feb 3

Feb 5

Cauchy's theorem via Green's Theorem; Definite integrals §2.3; Goursat's Proof §2.1

Cauchy integral formula and formula for derivatives §2.4

4 Feb 10

Feb 12

Removing f' continuous assumption; Cauchy inequalities, Liouville's Thm, Fund Thm of Algebra, Analyticity, Isolation of zeros §2.4

Identity principle, Mean Value Property, Maximum Modulus principle, Harmonic functions, Dirichlet problem.

5 (Feb break)

Feb 19

Morera's Theorem §2.5.1; Uniform convergence on compact sets §2.5.2; Runge approximation §2.5.5

6 Feb 24

Feb 26

Homotopy, simply connected, anti-derivatives §3.5; Complex logarithm §3.6

Mercator projection and log; Zeros and poles §3.1; Riemann removable singularity theorem

7 Mar 3

Mar 5 PRELIM

Residues §3.1; Residue formula and definite integrals §3.2

8 Mar 10

Mar 12

Laurent series (see Problem 3.3); Types of singularities §3.3

Argument principle, Rouche's Theorem, Open mapping theorem §3.4

9 Mar 17

Mar 19

Inverse function theorem, Local Mapping theorem, biholomorphisms

Mobius transformations, Automorphisms of C and Riemann sphere

10 Mar 24

Mar 26

Mobius triple transitivity, Disc and upper half plane are biholomorphic, Blaschke maps

Schwarz lemma, automorphisms of disc and upper half plane §8.2

Spring Break Mar 30 - Apr 3

11 Apr 7

Apr 9

Riemann mapping theorem, Equicontinuity and Arzela-Ascoli §8.3

Injectivity preserved under limits, Finish proof of RMT §8.3

12 Apr 14

Apr 16

Schwarz-Christoffel maps: rectangles §8.4.1

General Schwarz-Christoffel maps §8.4.2; Extension to boundary §8.4.3

13 Apr 21

Apr 23

Schwarz reflection principle §2.5.4; Schwarz-Christoffel maps are biholomorphisms §8.4.4

Schwarz-Christoffel map to rectangle and reflection §8.4.5; Ellipse arc length and elliptic integrals; Riemann surfaces

14 Apr 28

Apr 30

Peirce quincuncial projection as a doubly periodic meromorphic function; Riemann surface associated to plane algebraic curve; Lattices and definition of Weierstrass ℘ function §9.1

Double periodicity of ℘, Order of elliptic function, zeros of ℘', Differential equation for ℘ §9.1

15 May 5 [THIS MATERIAL NOT ON EXAM] Compactification of cubic curve in projective space; (℘, ℘') gives biholomorphism from torus to cubic; Addition law on cubic; Sum formula for ℘, and translation to ℘^{-1}; Elliptic integral identities -- return to reals

Date TBA FINAL

Last modified: Wed May 6 17:42:58 EDT 2026