Many of us met Alexander at ACE 2012 and had the privilege to became friends with him. 
Alexandre suddenly died some months after ACE 2012, on Friday, April 5. 

Alexandre absolutely loved the ACE 2012 conference, and everything that involved it, Kathmandu, the people! As he confided to some friends: " This has been by far the best conference I've ever been!"

Alexandre Topol, was a Professor at the Conservatoire National des Arts et Metiers, where he and his work was highly appreciated, both as a teacher, and as a person, which is evident in the testimonies of his students and colleagues. As teacher he had an expertise to make complicated programming concepts accessible and easy to understand to his students. Alexandre was one of that few people that you met and instantly feel completely at ease.

Here you can access his webpage
and here the homage blog