I am Juan Manuel Márquez Bobadilla and being a professional mathematician i'm going to add what it is still missing and what i consider can be held here. I am not a very well english writter but my math-skills (i believe) compensate that. I live and work in Guadalajara, México at the Universidad de Guadalajara, with already many years of experience in math. My specialties are algebra, analysis, differential geometry and topology
Please feel free to correct and request me on any subject around simple-math (which it doesn't mean: not advanced neither dull nor dumb)...