mb event system 7 Sections EventSystems Doc
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Def e@i.P(e) == e:E. loc(e) = i  Id & P(e)

is mentioned by

Thm* R:(Id), uid:(|R|), out,in:(|R|IdLnk).
Thm* ring(R;in;out)
Thm* 
Thm* Inj(|R|; uid)
Thm* 
Thm* loc.(ring-leader1(loc;R;uid;out;in)) 
Thm* realizes es.ldr:|R|. 
Thm* realizes es.e@ldr.kind(e) = locl("leader")
Thm* realizes es.& (i:|R|. e@i.kind(e) = locl("leader")  i = ldr  |R|)
[ring-leader1__realizes]
Thm* P:(AT), i:Id, k:Knd, a,x:Id.
Thm* A
Thm* 
Thm* T
Thm* 
Thm* x = "trigger"
Thm* 
Thm* locl(a) = k
Thm* 
Thm* loc.(trigger1(loc;T;A;P;i;k;a;x)) 
Thm* realizes es.(vartype(i;xA)
Thm* realizes es.e@i.kind(e) = k  Knd  (valtype(eT)
Thm* realizes es.e'@i.kind(e') = locl(a)
Thm* realizes es.& e'@i.
Thm* realizes es.& (e:E. 
Thm* realizes es.& ((e <loc e') & kind(e) = k  Knd & P((x when e),val(e)))
Thm* realizes es.e@i.kind(e) = k  Knd
Thm* realizes es.& e@i.
Thm* realizes es.& P((x when e),val(e))  e'@i.kind(e') = locl(a Knd
[trigger1__realizes]
Thm* a,i:Id.
Thm* loc.(once(loc;a;i)) 
Thm* realizes es.e@i.kind(e) = locl(a)
Thm* realizes es.e@i.e'@i.kind(e) = locl(a)
Thm* realizes es.& e@i.e'@i.
Thm* realizes es.& kind(e') = locl(a Knd  e = e'  E
[once__realizes]

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mb event system 7 Sections EventSystems Doc