Nuprl Lemma : es-fix_property
∀[Info:Type]
∀es:EO+(Info). ∀X:EClass(Top). ∀f:E(X) ─→ E(X).
((∀x:E(X). f x c≤ x) ⇒ (∀e:E(X). (((f f**(e)) = f**(e) ∈ E(X)) ∧ f**(e) is f*(e))))
Proof
Definitions occuring in Statement :
es-E-interface: E(X),
eclass: EClass(A[eo; e]),
event-ordering+: EO+(Info),
es-fix: f**(e),
es-causle: e c≤ e',
uall: ∀[x:A]. B[x],
top: Top,
all: ∀x:A. B[x],
implies: P ⇒ Q,
and: P ∧ Q,
apply: f a,
function: x:A ─→ B[x],
universe: Type,
equal: s = t ∈ T,
fun-connected: y is f*(x)
Lemmas :
es-E-interface_wf,
all_wf,
es-causle_wf,
event-ordering+_subtype,
eclass_wf,
top_wf,
es-E_wf,
event-ordering+_wf,
fix_property,
es-causle-interface-retraction
\mforall{}[Info:Type]
\mforall{}es:EO+(Info). \mforall{}X:EClass(Top). \mforall{}f:E(X) {}\mrightarrow{} E(X).
((\mforall{}x:E(X). f x c\mleq{} x) {}\mRightarrow{} (\mforall{}e:E(X). (((f f**(e)) = f**(e)) \mwedge{} f**(e) is f*(e))))
Date html generated:
2015_07_17-PM-01_00_15
Last ObjectModification:
2015_01_27-PM-10_41_57
Home
Index