olemus
operaator, mis funktsioonile f
seab vastavusse tema diferentsi Δf
=
an operator that is used to generalize the difference of a function in several variables

ülevaateid
https://en.wikipedia.org/wiki/Recurrence_relation#difference_operator

https://encyclopediaofmath.org/wiki/Difference_operator

vt ka
- diferents
- diferentsiaaloperaator