PT Journal AU MASAROVA, R TI THE NOTES ABOUT SOME BASE PROPERTIES OF FUNCTIONS SO Trends in education PY 2011 BP 116 EP 119 VL 4 IS 1 DE monotone function; increasing convex funkction. AB The article describes posible techniques of defining monotone, possibly convex and concave functions. It points out the most repeated errors and erroneous notion, which are made by students of technical schools. It includes posible extension of this area too. ER