Algebraic geometry (WS 2020)

This webpage contains lecture notes, homeworks for algebraic geometry.

Lecture notes:

Lecture 1 (02.10.2020) Systems of equations, rings, ideals, quotient ring. Functor of points, category theory, Yoneda lemma.

Homework 1 (due 16.10.2020)

Lecture 2 (09.10.2020) Noetherian condition, prime ideals, maximal ideals, radical, Spec, Zariski topology.

Lecture 3 (16.10.2020) Points, maximal ideals, closed points, geometric points, Specm, Nullstellensatz, ringed spaces, schemes.

Homework 2 (due 23.10.2020)

Lecture 4 (23.10.2020) Irreducibility, minimal primes, height, dimension, more on construction of Spec as a ringed space.

Homework 3 (due 30.10.2020)

Lecture 5 (30.10.2020) Proof of the sheaf property for the structure sheaf on Spec®. Heights of prime ideals and numbers of generators, localization.

Homework 4 (due 06.11.2020)

Lecture 6 (06.11.2020) Local rings, Nakayama lemma, artinian rings, length. Proof of the Krull Hauptidealsatz. Dimension of the polynomial ring.

Homework 5 (due 13.11.2020)

Lecture 7 (13.11.2020) Exercises. Schemes.

Homework 6 (due 20.11.2020)

Lecture 8 (20.11.2020) Morphisms of schemes, affinization, gluing.

Homework 7 (due 27.11.2020)

Lecture 9 (27.11.2020) More gluing. Proj.

Homework 8 (due 04.12.2020)

Lecture 10 (04.12.2020) Prime ideals and points with coefficients in fields. Locally ringed spaces. More Proj.

Homework 9 (due 11.12.2020)

Lecture 11 (11.12.2020) Proof that Proj is a scheme. Examples.

Lecture 12 (08.01.2021) More examples. Weighted projective spaces. Blowup. Curves on P2.

Homework 10 (due 15.01.2021)

Lecture 13 (15.01.2021) Parametrization of conics. Functor of points. Fiber products.

Homework 11 (due 22.01.2021)

Lecture 14 (22.01.2021)

Lecture 15 (29.01.2021)