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D.4.17.2 modNpos_test

Procedure from library noether.lib (see noether_lib).

Usage:
modNpos_test(i); i an ideal

Return:
1 if i is in Noether position 0 otherwise.

Note:
This test is a probabilistic test, and it computes the initial of the ideal modulo the prime number 2147483647 (the biggest prime less than 2^31).