PtoS project is a notebook to contain the pre-notes to EGA(/SGA) (see this). Please write to aayushverma6380@gmail.com for any typos, comments or tex files. In spirit, it is an evolving notebook subject to regular updates (which will contain provisional sections and likely unfinished threads). The following is a (tentative) plan and the content table of the notes.
(Last updated: 15 Jun 2026; version history)
