is an option for Dt which gives a list of objects to be taken as constants.


  • If f appears in the list of Constants, then both Dt[f] and Dt[f[]] are taken to be zero.


open allclose all

Basic Examples  (3)

Here both a and b are assumed to depend on x:

Specify that a does not depend on x using the Constants option:

Specify that both a and b are independent of x:

Scope  (3)

Use TagSet to prescribe a constant:

Use SetAttributes to prescribe a constant:

For a constant f any expression f[expr] is also assumed to be constant:

Properties & Relations  (2)

Constants allows Dt to emulate D:

NonConstants allows D to emulate Dt:

Introduced in 1988