Sat, 16 Mar 2019 14:14:42 +0000 Chengsong correctness test with enumeration
Fri, 15 Mar 2019 12:27:12 +0000 Chengsong :test whether bsimp(bders(r, s)) == ders_simp(r,s)
Fri, 15 Mar 2019 10:46:46 +0000 Chengsong removing PRED
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