Singular spaces and groupoids

CIMPA school on singular spaces and groupoids Considering (Lie) groupoids in order to study geometrical objects started with C. Ehresmann followed by his students in the 50's. Since then, Lie groupoids in relation to geometrical objects have appeared in many other branches of mathematics and physics. The objective of this school is to bring together different mathematicians working on various aspects of Lie groupoids in relation with foliations and singular spaces and their applications in order to offer students a broad panorama of the techniques and problems encountered.