Development of studies on the exact solution of extremal problems of the theory of best approximation

1990 ◽  
Vol 42 (1) ◽  
pp. 1-13 ◽  
Author(s):  
V. F. Babenko ◽  
A. A. Ligun
Keyword(s):  
Exact Solution ◽  
Best Approximation ◽  
Extremal Problems

scholarly journals On exact solution of some extremal problems on classes of functions defined by majorant of integral modulus of continuity

2021 ◽  
Vol 18 ◽  
pp. 102
Author(s):  
Ye.V. Derets
Keyword(s):  
Exact Solution ◽  
Modulus Of Continuity ◽  
Extremal Problems ◽  
Periodic Functions ◽  
Integral Modulus ◽  
Rectangle Formula

The error of the interval quadrature rectangle formula on the class of periodic functions with convex majorant of the integral modulus of continuity of even derivative are obtained.

Exact solution of a four-site crystal model for an intermediate-valence system

1986 ◽  
Vol 47 (6) ◽  
pp. 1029-1034 ◽  
Author(s):  
J.C. Parlebas ◽  
R.H. Victora ◽  
L.M. Falicov
Keyword(s):  
Exact Solution ◽  
Intermediate Valence ◽  
Crystal Model
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