Proof of a particular case of the Pythagorean theorem reproduced from a Book written by Abraham Bar Hiyya in Barcelona 900 years ago.
Catalan Wikipedia meeting in Berlin organized while stranded due to the Icelandic volcano's ash. I am the one with the white hair.

Wikipedia is my hobby. The idea of free knowledge enthusiasms me because we are performing a fun activity while contributing to build a work that has value for humankind.

It seems to me that this paradigm breaks the classical outlines of economy where you dedicate a part of your time to do things for the others in exchange for money in a stressful environment and another part of your time to consume things using this money. I think that if there were more and more people dedicating to the projects part of their time the world would be a bit better and the people would live a bit happier.

My participation to the projects edit

My participation here at meta edit

Contribution to the definition of the movement edit

Fund raising campaigns edit

Project promotion and miscelaneous edit

Participation at Wikimania edit