Lefschetz, Solomon, 1884-1972.

Differential equations; geometric theory/ Solomon Lefschetz. - New York: Interscience Publishers, 1957. - 364 p.: illus., 24 cm. - Pure and applied mathematics, v. 6. . - Pure and applied mathematics (Interscience Publishers) v. 6. .

57009155 /L/r83

GB58-2298


Differential equations.
Topology.

515.35