change variable dependencies in unevaluated derivatives
expression involving Diff
Routines in the liesymm package manipulate and produce results expressed in terms of ``inert derivatives'' by using Diff(). A key advantage of this inert representation is that the operands can be modified to reflect desired changes in dependencies prior to evaluation. The vfix() command changes the variable dependencies for functions appearing in these expressions.
One can use convert(...) and dvalue() to reformulate the resulting PDE.
The results of using diff() and Diff() often display the same way. To determine which of these two is actually present, use lprint(). or has( ... , diff), etc..
This routine is ordinarily loaded via with(liesymm) but can be used in the ``package style'' as liesymm[vfix]()
eq ≔ dvalue⁡
eq ≔ ∂2∂x2⁢h⁡t,x=∂∂t⁢h⁡t,x
eq2 ≔ dvalue⁡
eq2 ≔ ∂3∂x2⁢∂t⁢h⁡t,x=∂2∂t2⁢h⁡t,x
make h independent of t and x.
make h independent of t.
Convert to different representations.
Download Help Document
What kind of issue would you like to report? (Optional)
Thank you for submitting feedback on this help document. Your feedback will be used
to improve Maple's help in the future.