is an option for D which gives a list of objects to be taken to depend implicitly on the differentiation variables.


  • If c does not appear in the list of NonConstants, then D[c,x] is taken to be 0 unless c and x are identical expressions.


open allclose all

Basic Examples  (1)

Here c is treated as a constant under differentiation:

Specify that c depends implicitly on x:

Specify that both c and d depend implicitly on x:

Properties & Relations  (2)

NonConstants allows D to emulate Dt:

Constants allows Dt to emulate D:

Introduced in 1988