Several useful links
ArXiv-Math
MathOverflow
Mathematicians
Math Genealogy
Conference: alg. geometry
Conference: number theory
References:
EGA
SGA
BookFinder
Stack Project
Reinventing Rational Points
Computer Science:
PDF tools
Expressvpn
JPG compressor 1
JPG compressor 2
ZOL computer adv search
Live in France:
ADUM
Emails:
Gmail
Netease
LaTex:
CTAN
DeTeXify
TeX-colors
Tikzcd-editor
TeX-StackExchange