[isabelle-dev] Lemma "sum_image_le"

Dear list, lemma "sum_image_le" in theory "Groups_Big", which is stated for type-class "ordered_ab_group_add", holds more generally for "ordered_comm_monoid_add" (proof below). May I propose to change it accordingly? Best regards, Alexander lemma sum_image_le:   fixes g :: "'a ⇒

Re: [isabelle-dev] Lemma "sum_image_le"

Sounds good to me! Larry > On 28 Sep 2018, at 14:00, Alexander Maletzky > wrote: > > > lemma "sum_image_le" in theory "Groups_Big", which is stated for > type-class "ordered_ab_group_add", holds more generally for > "ordered_comm_monoid_add" (proof below). May I propose to change it >