(NpERIODI^ESKO(B-(NPARABOLI^ESKIE GRANI^NYE ZADA^I I POLOVITELXNOSTX (B=s Periodic - parabolic Boundary Value problems and positivity - (NhESS(B, (NpITERs; (NbOBYLEW(B, (Nn(B.(Na(B.s; (NpISKAREW(B, (Ns(B.(Ni(B.s ((NmOSKWA (B:s (NmIR(B,s, 2001)
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Keywords: (NmATEMATI^ESKIJ ANALIZs; (NdIFFERENCIALXNYE URAWNENIQ S ^ASTNYMI PROIZWODNYMI PARABOLI^ESKOGO TIPAs; (NkA^ESTWENNAQ TEORIQ (B- (NkRAEWYE ZADA^Is