Nuprl Lemma : comb_for_ndiff_wf
λa,b,z. (a -- b) ∈ a:ℤ ⟶ b:ℤ ⟶ (↓True) ⟶ ℤ
Proof
Definitions occuring in Statement :
ndiff: a -- b,
squash: ↓T,
true: True,
member: t ∈ T,
lambda: λx.A[x],
function: x:A ⟶ B[x],
int: ℤ
Definitions unfolded in proof :
member: t ∈ T,
squash: ↓T,
uall: ∀[x:A]. B[x],
prop: ℙ
Lemmas referenced :
ndiff_wf,
squash_wf,
true_wf,
istype-int
Rules used in proof :
sqequalSubstitution,
sqequalTransitivity,
computationStep,
sqequalReflexivity,
Error :lambdaEquality_alt,
sqequalHypSubstitution,
imageElimination,
cut,
introduction,
extract_by_obid,
isectElimination,
thin,
hypothesisEquality,
equalityTransitivity,
hypothesis,
equalitySymmetry,
Error :universeIsType,
Error :inhabitedIsType
Latex:
\mlambda{}a,b,z. (a -- b) \mmember{} a:\mBbbZ{} {}\mrightarrow{} b:\mBbbZ{} {}\mrightarrow{} (\mdownarrow{}True) {}\mrightarrow{} \mBbbZ{}
Date html generated:
2019_06_20-PM-01_13_55
Last ObjectModification:
2018_10_03-AM-00_45_31
Theory : int_2
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