- parametro differenziale secondo
- матем. лапласиан
Dictionnaire polytechnique italo-russe. 2013.
Dictionnaire polytechnique italo-russe. 2013.
Picone identity — In mathematics, in the field of ordinary differential equations, the Picone identity, named after Mauro Picone, is a classical result about homogeneous linear second order differential equations. It is useful in studying the oscillation of such… … Wikipedia