ApCoCoA-1:DA.InitialOfDer: Difference between revisions
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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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<command> | <command> | ||
<title>diffalg.InitialOfDer</title> | <title>diffalg.InitialOfDer</title> | ||
<short_description> | <short_description>the initial wrt. a given derivative</short_description> | ||
<syntax> | <syntax> | ||
$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
-------------------------------
