TY  - JOUR
AU  - Zofia Denkowska
TI  - An example of a function which is locally constant in an open dense set, everywhere differentiable but not constant
JO  - Annales Polonici Mathematici
PY  - 1973
SP  - 195
EP  - 199
VL  - 28
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap-28-2-195-199/
DO  - 10.4064/ap-28-2-195-199
LA  - en
ID  - 10_4064_ap_28_2_195_199
ER  -