Difference between revisions of "ApCoCoA-1:DA.InitialOfDer"
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S schuster (talk | contribs) (New page: <command> <title>diffalg.InitialOfDer</title> <short_description>Returns the initial wrt. a given indeterminate.</short_description> <syntax> $diffalg.InitialOfDer(F:POLY, X:INDET)...) |
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$diffalg.InitialOfDer(F:POLY, X:INDET):POLY | $diffalg.InitialOfDer(F:POLY, X:INDET):POLY | ||
Revision as of 09:06, 22 December 2008
diffalg.InitialOfDer
the initial wrt. a given derivative
Syntax
$diffalg.InitialOfDer(F:POLY, X:INDET):POLY
Description
InitialOfDer returns the polynomial leading coefficient of polynomial F regarded as polynomial in the derivative X.
Example
Use Q[x[1..2,0..20]];
Use Q[x[1..2,0..20]], Ord($diffalg.DiffTO("Lex"));
F:=x[1,2]^3x[2,2]^2 + x[1,1]^3x[2,2]^2 + 1/4x[1,2];
$diffalg.InitialOfDer(F, x[1,2]);
-------------------------------
x[2,2]^2
-------------------------------
