functional inequality;
subadditive mappings;
Dini derivatives;
HOSSZU FUNCTIONAL INEQUALITY;
D O I:
10.1017/S0004972713000889
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
Answering a problem posed by John Michael Rassias, we study the functional inequality f (x + y + xy) <= f (x) + f (y) + f (xy), with real unknown mapping f.
机构:
Literataura Ikerketa Batzardekadea, Luskattzain Eemeritua Eta, Leioa, SpainLiterataura Ikerketa Batzardekadea, Luskattzain Eemeritua Eta, Leioa, Spain
机构:
Univ Chicago, Comm Social Thought, Chicago, IL 60637 USA
Univ Chicago, Dept Philosophy, Chicago, IL 60637 USAUniv Chicago, Comm Social Thought, Chicago, IL 60637 USA