convert a differential equation to a differential operator
convert a differential operator to a differential equation
de2diffop(eqn, dvar, domain)
diffop2de(L, dvar, domain)
homogeneous linear differential equation
(optional if _Envdiffopdomain is set) list containing two names
An element L in C(x)[Dx] corresponds to a linear homogeneous differential equation L⁡y⁡x=0. These two procedures convert between the operator L and the equation L⁡y⁡x. See also the help page diffop on linear differential operators.
The argument domain describes the differential algebra. If this argument is the list Dx,x then the differential operators are notated with the symbols Dx and x. They are viewed as elements of the differential algebra C(x)[Dx] where C is the field of constants.
If the argument domain is omitted then the differential specified by the environment variable _Envdiffopdomain will be used. If this environment variable is not set then the argument domain may not be omitted.
These functions are part of the DEtools package, and so they can be used in the form de2diffop(..) and diffop2de(..) only after executing the command with(DEtools). However, they can always be accessed through the long form of the command by using DEtools[de2diffop](..) or DEtools[diffop2de](..).
_Envdiffopdomain ≔ Dx,x:
L ≔ Dx2+x
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