Tue, 12 Sep 2017 20:40:46 +0200 nipkow introduced zip_with
Tue, 12 Sep 2017 12:14:38 +0200 nipkow added lemma
Mon, 11 Sep 2017 18:36:13 +0200 wenzelm clarified signature: proper result;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 +3000 +10000 tip