Nuprl Lemma : rinv-as-rdiv
∀[y:ℝ]. rinv(y) = (r1/y) supposing y ≠ r0
Proof
Definitions occuring in Statement :
rdiv: (x/y),
rneq: x ≠ y,
rinv: rinv(x),
req: x = y,
int-to-real: r(n),
real: ℝ,
uimplies: b supposing a,
uall: ∀[x:A]. B[x],
natural_number: $n
Definitions unfolded in proof :
rdiv: (x/y),
uall: ∀[x:A]. B[x],
member: t ∈ T,
uimplies: b supposing a,
all: ∀x:A. B[x],
itermConstant: "const",
req_int_terms: t1 ≡ t2,
false: False,
implies: P ⇒ Q,
not: ¬A,
top: Top,
uiff: uiff(P;Q),
and: P ∧ Q,
prop: ℙ
Lemmas referenced :
real_term_polynomial,
itermSubtract_wf,
itermVar_wf,
itermMultiply_wf,
itermConstant_wf,
rinv_wf2,
int-to-real_wf,
real_term_value_const_lemma,
real_term_value_sub_lemma,
real_term_value_var_lemma,
real_term_value_mul_lemma,
req-iff-rsub-is-0,
rmul_wf,
req_witness,
rneq_wf,
real_wf
Rules used in proof :
sqequalSubstitution,
sqequalRule,
sqequalReflexivity,
sqequalTransitivity,
computationStep,
isect_memberFormation,
introduction,
cut,
extract_by_obid,
sqequalHypSubstitution,
dependent_functionElimination,
thin,
isectElimination,
natural_numberEquality,
hypothesis,
computeAll,
lambdaEquality,
int_eqEquality,
hypothesisEquality,
independent_functionElimination,
intEquality,
isect_memberEquality,
voidElimination,
voidEquality,
productElimination,
independent_isectElimination,
because_Cache,
equalityTransitivity,
equalitySymmetry
Latex:
\mforall{}[y:\mBbbR{}]. rinv(y) = (r1/y) supposing y \mneq{} r0
Date html generated:
2017_10_03-AM-08_34_06
Last ObjectModification:
2017_04_04-PM-03_50_07
Theory : reals
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