padic_radix_mat_find_nonzero_pivot
Synopsis
#include <flint/padic_radix.h>int padic_radix_mat_find_nonzero_pivot(slong * pivot_row, gr_mat_t mat, slong start_row, slong end_row, slong column, gr_ctx_t ctx)sourceImplements the generic method gr_mat_find_nonzero_pivot, used by the generic LU decomposition, solving, inversion and reduced row echelon form algorithms: chooses a row whose entry in the given column has minimal valuation, so that the elimination only involves multipliers of nonnegative valuation. Returns GR_UNABLE if there is no nonzero entry but some inexact zero, and GR_DOMAIN if all entries are exact zeros.
Cite this page
The FLINT team, “padic_radix_mat_find_nonzero_pivot (padic_radix.h),” FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev, 2026. https://flintlib.org/doc/padic_radix/padic_radix_mat_find_nonzero_pivot.html (generated 2026-11-02).
@misc{flint-doc-padic-radix-padic-radix-mat-find-nonzero-pivot,
author = {{The FLINT team}},
title = {{padic\_radix\_mat\_find\_nonzero\_pivot (padic\_radix.h)}},
howpublished = {FLINT: Fast Library for Number Theory, documentation, version 3.7.0-dev},
year = {2026},
url = {https://flintlib.org/doc/padic_radix/padic_radix_mat_find_nonzero_pivot.html},
note = {Generated 2026-11-02}
}