ApCoCoA-1:DA.LD: Difference between revisions
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<command> | <command> | ||
<title>DA.LD</title> | <title>DA.LD</title> | ||
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Use QQ[x[1..2,0..20]]; | Use QQ[x[1..2,0..20]]; | ||
Use QQ[x[1..2,0..20]], Ord(DA.DiffTO( | Use QQ[x[1..2,0..20]], Ord(DA.DiffTO("DegOrd")); | ||
F:=x[1,2]^2*x[1,1]-x[2,4]^3; | F:=x[1,2]^2*x[1,1]-x[2,4]^3; | ||
DA.LD(F); | DA.LD(F); | ||
Latest revision as of 13:30, 29 October 2020
| This article is about a function from ApCoCoA-1. |
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("DegOrd"));
F:=x[1,2]^2*x[1,1]-x[2,4]^3;
DA.LD(F);
-------------------------------
x[2,4]
-------------------------------
