Impossibility of constructing continuous functions of n+1 variables from functions of n variables by means of certain continuous operators

被引:1
|
作者
Marchenkov, SS [1 ]
机构
[1] RAS, MV Keldysh Appl Math Inst, Moscow, Russia
关键词
D O I
10.1070/SM2001v192n06ABEH000573
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Continuous functions on a unit cube are considered. The concept of continuity regulator is introduced: in the definition of uniform continuity it governs the transition 'from epsilon to delta'. The problem of obtaining continuous functions of n + 1 variables with continuity regulator delta from functions of n variables; with the same continuity regulator by means of uniformly continuous operators with continuity regulators that are superpositions of the regulator delta is posed. The insolubility of this problem is demonstrated for continuity regulators delta(epsilon) such that for each alpha greater than or equal to 0 the inequality delta(epsilon) greater than or equal to epsilon (1+alpha) holds starting from some epsilon (alpha).
引用
收藏
页码:863 / 878
页数:16
相关论文
共 50 条