00711nam a2200181Ia 450000500170000000800410001702000130005808200160007110000240008724500560011126000090016730000280017650501690020470000280037394200080040199900170040995201030042620241211205641.0241211s1991    xx            000 0 und d  afcnm2021  a516.362/G96  aGutierrez, Carlos   0aLines Of Curvature And Umbilical Points On Surfaces  c1991  a125 páginase1 CD-ROM  a1. Introduction from the ellipsoid to structural 2. Umbilic points 3. Principal cycles and a genericity result 4. The stability theorem 5. The approximation theorem  a Sotomayor Tello, Jorge  yLIB  c51242d51242  00104070aBE-FCNMbBE-FCNMcTPd2018-06-20eDonacionfBuenoo516.362/G96pFCNM3357yLIBzExterno