TY - BOOK ED - U. S. A. TI - American mathematical society translations SN - 0821830511 U1 - 510.6 PY - 1973/// CY - Rhode Island PB - American Mathematical Society KW - Differential equations KW - Differential equations, Partial KW - Differential operators N1 - Contents: v. 101. Six papers in analysis / B. M. Levitan ER -