eliminate tracks the history of edits in a logical array H.
H has nrow(E) rows and the number of columns is the number of
edits in the
editmatrix as it was first defined. If
H[i,j1], H[i,j2],...,H[i,jn] are
TRUE, then E[i,] is some
(positive, linear) combination of original edits E[j1,], E[j2,],...,E[jn,]
h records the number of variables eliminated from E by
1 2 3
Attributes H and h are used to detect redundant derived edits.
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