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diff --git a/texmf-dist/scripts/ketpic/ketlib/maximaL/matoperation.max b/texmf-dist/scripts/ketpic/ketlib/maximaL/matoperation.max
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+++ b/texmf-dist/scripts/ketpic/ketlib/maximaL/matoperation.max
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+/* Maxima tips http://www.cymric.jp/maxima/tips.html */
+
+rowmult(X, n, c) := block([M],
+ M:matrix(),
+ for i:1 thru length(X) do
+ if i=n then M:addrow(M, c*row(X, i))
+ else M:addrow(M, row(X, i)),
+ M
+);
+rowadd(X, n, m, c) := block([M],
+ M:matrix(),
+ for i:1 thru length(X) do
+ if i=n then M:addrow(M, c * row(X, m) + row(X, i))
+ else M:addrow(M, row(X, i)),
+ M
+);
+rowch(X, m, n) := block([M],
+ M:matrix(),
+ for i:1 thru length(X) do
+ if i=m then M:addrow(M, row(X, n))
+ else if i=n then M:addrow(M, row(X, m))
+ else M:addrow(M, row(X, i)),
+ M
+);
+
+colmult(X, n, c) := block([M],
+ M:matrix(),
+ for i:1 thru length(transpose(X)) do
+ if i=n then M:addcol(M, c*col(X, i))
+ else M:addcol(M, col(X, i)),
+ M
+);
+coladd(X, n, m, c) := block([M],
+ M:matrix(),
+ for i:1 thru length(transpose(X)) do
+ if i=n then M:addcol(M, c * col(X, m) + col(X, i))
+ else M:addcol(M, col(X, i)),
+ M
+);
+colch(X, m, n) := block([M],
+ M:matrix(),
+ for i:1 thru length(transpose(X)) do
+ if i=m then M:addcol(M, col(X, n))
+ else if i=n then M:addcol(M, col(X, m))
+ else M:addcol(M, col(X, i)),
+ M
+);