the_es:event_system{i:l}, e,e',y:es-E(the_es).
l_before(e'; y; before(e); es-E(the_es))  (es-locl(the_es; e'; y)  es-locl(the_es; y; e)) 

latex

Definitions	event_system{i:l}, t  T, x:A. B(x), es-E(es), es-locl(es; e; e'), prop{i:l}, P  Q, l_before(x; y; l; T), before(e), P  Q, P  Q, P  Q, b, , False, Unit, guard(T), x. t(x), wellfounded{i:l}(A; x,y.R(x;y)), es-first(es; e), b, A, (x  l), P  Q, es-pred(es; e)
Lemmas	l member wf, es-pred-locl, member singleton, l before append iff, es-pred wf, es-locl-wellfnd, es-locl-iff, eqtt to assert, iff transitivity, eqff to assert, assert of bnot, es-first wf, bool wf, bnot wf, not wf, assert wf, l before member, member-es-before, l before-es-before, l before wf, es-before wf, es-locl wf, es-E wf, event system wf