ng nonsingular systems of linear equations,
and Gaussian elimination

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<a href="mat_lzz_pE.cpp.html"><tt>mat_lzz_pE</tt></a>

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class <tt>mat_zz_pE</tt>: matrices over <tt>zz_pE</tt>;
includes basic matrix arithmetic operations,
including determinant calculation, matrix inversion,
solving nonsingular systems of linear equations,
and Gaussian elimination



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