TY  - JOUR
AU  - A. M. Nakhushev
TI  - On the positivity of continuous and discrete differentiation and integration operators that are very important in fractional calculus and in the theory of equations of mixed type
JO  - Differencialʹnye uravneniâ
PY  - 1998
SP  - 101
EP  - 109
VL  - 34
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1998_34_1_a15/
LA  - ru
ID  - DE_1998_34_1_a15
ER  -