/usr/share/yacas/multivar.rep/sparsetree.ys.def is in yacas 1.3.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | CreateSparseTree
SparseTreeMap
SparseTreeScan
AddSparseTrees
MultiplyAddSparseTrees
SparseTreeGet
}
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