Nice things

To be updated continuously

Here I will put some materials and notes as well as share some hints and good sites.

• On a theorem by Castelnuovo: notes and slides for the Algebraic Surfaces Seminar at UFRJ, 2020.

• Aspects of the Cremona group of the projective complex plane: notes of a Summer course at IMPA, 2020.

Algebraic Geometry is Artistic Geometry!

A beautiful exercise from the book Complex Algebraic Surfaces, Arnaud Beauville.

The ten lines on a quintic del Pezzo surface S_5 are arranged as follows: six sides of a skew hexagon; three transversals joining opposite sides of the hexagon; one joining the three transversals.

This is awesome! It was really fun to make these drawings.