TY - BOOK AU - Chruščev, S. V. TI - ˆThe ‰regge problem for strings, unconditionally convergent eigen-function expansions, and unconditional bases of exponentials in L²(-T, T) T2 - LOMI preprints VL - E-3-84 PY - 1984/// CY - L. PB - USSR Acad. of sciences, Steklov math. inst. Leningrad dep. KW - Операторы (мат.) KW - Спектральная теория KW - nlr_sh1 KW - В162.41 KW - rubbk N2 - Библиогр.: с. 31 ER -