On the functional inequality $|f(\frac{x+y}{2})|\leqq\frac{|f(x)|+|f(y)|}{2}$
HARUKI, Hiroshi
J. Math. Soc. Japan, Tome 16 (1964) no. 4, p. 39-41 / Harvested from Project Euclid
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Publié le : 1964-01-15
Classification:  39.99 
@article{1260976290,
     author = {HARUKI, Hiroshi},
     title = {On the functional inequality $|f(\frac{x+y}{2})|\leqq\frac{|f(x)|+|f(y)|}{2}$},
     journal = {J. Math. Soc. Japan},
     volume = {16},
     number = {4},
     year = {1964},
     pages = { 39-41},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1260976290}
}

HARUKI, Hiroshi. On the functional inequality $|f(\frac{x+y}{2})|\leqq\frac{|f(x)|+|f(y)|}{2}$. J. Math. Soc. Japan, Tome 16 (1964) no. 4, pp.  39-41. http://gdmltest.u-ga.fr/item/1260976290/