00715cam 22002411 450 1914458http://id.bnportugal.gov.pt/bib/porbase/191445820030510184700.00-8176-3187-965419PTBN0039004119900220d1985 k y0pory0103 baengrusUSSingularities of differential mapsBostonBirkhauser1985X, 382 p.1º v.: The classification of critical points, caustics and wave fronts517.5medeng299285ArnoldV. I.191106Gusein-ZadeS. M.0701506521VarchenkoA. N.0701506522PTBNRPCO. 05.14coopUCMAmq586238bccoopUCMA155260UCMA5-233