Nuprl Lemma : board-cell_wf
∀[T:Type]. ∀[n:ℕ]. ∀[b:square-board(n;T)]. ∀[i,j:ℕn].  (board-cell(b;i;j) ∈ T)
Proof
Definitions occuring in Statement : 
board-cell: board-cell(b;i;j)
, 
square-board: square-board(n;T)
, 
int_seg: {i..j-}
, 
nat: ℕ
, 
uall: ∀[x:A]. B[x]
, 
member: t ∈ T
, 
natural_number: $n
, 
universe: Type
Definitions unfolded in proof : 
uall: ∀[x:A]. B[x]
, 
member: t ∈ T
, 
square-board: square-board(n;T)
, 
board-cell: board-cell(b;i;j)
, 
and: P ∧ Q
, 
int_seg: {i..j-}
, 
uimplies: b supposing a
, 
guard: {T}
, 
nat: ℕ
, 
ge: i ≥ j 
, 
lelt: i ≤ j < k
, 
all: ∀x:A. B[x]
, 
decidable: Dec(P)
, 
or: P ∨ Q
, 
satisfiable_int_formula: satisfiable_int_formula(fmla)
, 
exists: ∃x:A. B[x]
, 
false: False
, 
implies: P 
⇒ Q
, 
not: ¬A
, 
top: Top
, 
prop: ℙ
, 
squash: ↓T
, 
true: True
, 
subtype_rel: A ⊆r B
, 
iff: P 
⇐⇒ Q
, 
rev_implies: P 
⇐ Q
Lemmas referenced : 
iff_weakening_equal, 
true_wf, 
squash_wf, 
less_than_wf, 
nat_wf, 
square-board_wf, 
int_seg_wf, 
int_formula_prop_eq_lemma, 
int_formula_prop_less_lemma, 
intformeq_wf, 
intformless_wf, 
decidable__lt, 
int_formula_prop_wf, 
int_term_value_var_lemma, 
int_term_value_constant_lemma, 
int_formula_prop_le_lemma, 
int_formula_prop_not_lemma, 
int_formula_prop_and_lemma, 
itermVar_wf, 
itermConstant_wf, 
intformle_wf, 
intformnot_wf, 
intformand_wf, 
satisfiable-full-omega-tt, 
decidable__le, 
nat_properties, 
int_seg_properties, 
list_wf, 
select_wf
Rules used in proof : 
sqequalSubstitution, 
sqequalTransitivity, 
computationStep, 
sqequalReflexivity, 
isect_memberFormation, 
introduction, 
cut, 
sqequalHypSubstitution, 
setElimination, 
thin, 
rename, 
sqequalRule, 
productElimination, 
lemma_by_obid, 
isectElimination, 
cumulativity, 
hypothesisEquality, 
because_Cache, 
hypothesis, 
independent_isectElimination, 
natural_numberEquality, 
equalityTransitivity, 
equalitySymmetry, 
dependent_functionElimination, 
unionElimination, 
dependent_pairFormation, 
lambdaEquality, 
int_eqEquality, 
intEquality, 
isect_memberEquality, 
voidElimination, 
voidEquality, 
independent_pairFormation, 
computeAll, 
axiomEquality, 
universeEquality, 
applyEquality, 
imageElimination, 
imageMemberEquality, 
baseClosed, 
independent_functionElimination
Latex:
\mforall{}[T:Type].  \mforall{}[n:\mBbbN{}].  \mforall{}[b:square-board(n;T)].  \mforall{}[i,j:\mBbbN{}n].    (board-cell(b;i;j)  \mmember{}  T)
Date html generated:
2016_05_15-PM-03_13_58
Last ObjectModification:
2016_01_16-AM-10_47_52
Theory : general
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