On functional equation $\varphi\varphi(x)=x$, $x\in(-\infty,\infty)$
Laitoch, Miroslav
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 31 (1992), p. 83-100 / Harvested from Czech Digital Mathematics Library
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Publié le : 1992-01-01
Classification:  39B12,  39B22 
@article{120283,
     author = {Miroslav Laitoch},
     title = {On functional equation $\varphi\varphi(x)=x$, $x\in(-\infty,\infty)$},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     volume = {31},
     year = {1992},
     pages = {83-100},
     zbl = {0767.39003},
     mrnumber = {1212608},
     language = {en},
     url = {http://dml.mathdoc.fr/item/120283}
}

Laitoch, Miroslav. On functional equation $\varphi\varphi(x)=x$, $x\in(-\infty,\infty)$. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 31 (1992) pp. 83-100. http://gdmltest.u-ga.fr/item/120283/

Kuczma M. Functional equation in a single variable, Polska akademia nauk, Monografie matematyczne, Tom 4, PWN - Polish scientific publishers, Warszawa 1968. (1968) | MR 0228862