positive definite functions;
Fourier transform;
Bochner-Khinchine theorem;
piece-wise linear functions with equidistant nodes;
D O I:
10.1134/S0001434620050272
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
Schep proved that, for a piecewise linear function with nodes at integer points, positive definiteness on Double-struck capital R is equivalent to positive definiteness on DOUBLE-STRUCK CAPITAL Z. In this paper, a similar theorem for an entire function of exponential type is proved, and a generalization Schep's theorem is obtained.
机构:
Moscow MV Lomonosov State Univ, Dept Number Theory, Fac Mech & Math, Moscow 119992, RussiaMoscow MV Lomonosov State Univ, Dept Number Theory, Fac Mech & Math, Moscow 119992, Russia