00438nam a2200145Ia 4500 251030b |||||||| |||| 00| 0 eng d 515.35 F911.PD Friedrichs, K. O. 11216 Pseudo-differential operators; an introduction / Rev. New York: New York University, 1970 vi, 279p. Courant Institute lecture notes ddc BK 0 0 0 515_350000000000000_F911_PD 0 16490 ISI ISI 1998-09-23 0 515.35 F911.PD DP14730 2019-02-14 00:00:00 BK 13559 13559