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D.2.12.24 isSubModule

Procedure from library ring.lib (see ring_lib).

Return:
1 if module(I) is in module(J), 0 otherwise

Example:
 
LIB "ring.lib";
ring r=0,x,dp;
ideal I1=x2;
ideal I2=x3;
isSubModule(I1, I2);
==> 0
isSubModule(I2, I1);
==> 1

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