ApCoCoA-1:DA.LD
From ApCoCoAWiki
Revision as of 08:10, 7 October 2020 by AndraschkoBot (talk | contribs) (fixed links to namespace ApCoCoA)
DA.LD
Computes the leading derivative of a differential polynomial.
Syntax
DA.LD(F:POLY):POLY
Description
DA.LD computes the leading derivative of polynomial F wrt. the current differential term ordering, or the hereby induced ranking respectively.
@param F A differential polynomial.
@return The leading derivative of F.
Example
Use QQ[x[1..2,0..20]]; Use QQ[x[1..2,0..20]], Ord(DA.DiffTO(<quotes>DegOrd</quotes>)); F:=x[1,2]^2*x[1,1]-x[2,4]^3; DA.LD(F); ------------------------------- x[2,4] -------------------------------
