The concept of characteristic interval for piecewise monotone functions is introduced and used in the study of their iterative roots on a closed interval.
@article{bwmeta1.element.bwnjournal-article-apmv65z2p119bwm, author = {Weinian Zhang}, title = {PM functions, their characteristic intervals and iterative roots}, journal = {Annales Polonici Mathematici}, volume = {66}, year = {1997}, pages = {119-128}, zbl = {0873.39009}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-apmv65z2p119bwm} }
Weinian Zhang. PM functions, their characteristic intervals and iterative roots. Annales Polonici Mathematici, Tome 66 (1997) pp. 119-128. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-apmv65z2p119bwm/
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