Ovsienko,Valentin

Projective differential geometry old and new : from the schwarzian derivate to the cohomology of diffeomorphism groups / valentin Ovsienko, Serge Tabachnikov . - New York : cambridge university press, c2005 . - I-249 p. ; 23 cm. - cambridge tracts in mathematics 165 .

bibliogr,index

9780521831864

don PARES

513.73