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LC    --    the leading coefficient of a polynomial or ModuleElem


Syntax 
LC(F: RINGELEM|MODULEELEM): RINGELEM

Description
This function returns the leading coefficient of F, as determined by the term-ordering of the ring to which F belongs. It is an error if F is zero.

Example 
/**/  use R ::= QQ[x,y];
/**/  LC(x +3*x^2 -5*y^2);
3

/**/  F := NewFreeModule(R,3);
/**/  LC(ModuleElem(F, [0,  5*y+6*x^2,  y^2]));
6

See Also