Editing 1983 in science (section)

==Mathematics==
* [[Daniel Gorenstein]] (with Richard Lyons) proves the [[trichotomy theorem]] for [[List of finite simple groups|finite simple groups]] of characteristic 2 type and rank at least 4, and announces that proof of the [[classification of finite simple groups]] is complete (although that for [[quasithin group]]s has not been demonstrated at this time).<ref>{{cite book|last=Gorenstein|first=Daniel|title=The classification of finite simple groups. Vol. 1. Groups of noncharacteristic 2 type|location=New York|publisher=Plenum Press|series=The University Series in Mathematics|isbn=978-0-306-41305-6|year=1983|mr=746470}}</ref>