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D.15.13.6 createQuotientGroup

Procedure from library multigrading.lib (see multigrading_lib).

Usage:
createGroup(L); L is an integer matrix

Purpose:
create the group of the form (I+L)/L,
where I is the square identity matrix of size nrows(L) x nrows(L)

Note:
L specifies relations between free generators of Z^nrows(L)

Return:
group

Example:
 


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