Nuprl Lemma : fps-deriv-commutes
∀[X:Type]. ∀[eq:EqDecider(X)]. ∀[r:CRng]. ∀[f,g:PowerSeries(X;r)]. ∀[x,y:X].  (ddf/dx/dy = ddf/dy/dx ∈ PowerSeries(X;r))
Proof
Definitions occuring in Statement : 
fps-deriv: df/dx, 
power-series: PowerSeries(X;r), 
deq: EqDecider(T), 
uall: ∀[x:A]. B[x], 
universe: Type, 
equal: s = t ∈ T, 
crng: CRng
Definitions unfolded in proof : 
uall: ∀[x:A]. B[x], 
member: t ∈ T, 
uiff: uiff(P;Q), 
and: P ∧ Q, 
uimplies: b supposing a, 
all: ∀x:A. B[x], 
fps-deriv: df/dx, 
fps-coeff: f[b], 
crng: CRng, 
rng: Rng, 
subtype_rel: A ⊆r B, 
nat: ℕ, 
power-series: PowerSeries(X;r), 
true: True, 
infix_ap: x f y, 
squash: ↓T, 
prop: ℙ, 
guard: {T}, 
iff: P ⇐⇒ Q, 
rev_implies: P ⇐ Q, 
implies: P ⇒ Q, 
deq: EqDecider(T), 
bool: 𝔹, 
unit: Unit, 
it: ⋅, 
btrue: tt, 
eqof: eqof(d), 
ifthenelse: if b then t else f fi , 
bfalse: ff, 
exists: ∃x:A. B[x], 
or: P ∨ Q, 
sq_type: SQType(T), 
bnot: ¬bb, 
assert: ↑b, 
false: False, 
not: ¬A, 
top: Top
Lemmas referenced : 
fps-ext, 
fps-deriv_wf, 
bag_wf, 
rng_car_wf, 
int-to-ring_wf, 
bag-count_wf, 
nat_wf, 
cons-bag_wf, 
rng_times_wf, 
equal_wf, 
squash_wf, 
true_wf, 
rng_times_assoc, 
subtype_rel_self, 
iff_weakening_equal, 
ifthenelse_wf, 
bool_wf, 
eqtt_to_assert, 
safe-assert-deq, 
and_wf, 
eqff_to_assert, 
bool_cases_sqequal, 
subtype_base_sq, 
bool_subtype_base, 
assert-bnot, 
crng_times_comm, 
rng_wf, 
add_functionality_wrt_eq, 
bag-count-cons, 
bag-append-assoc2, 
cons-bag-as-append, 
bag-append-assoc, 
bag-append-assoc-comm, 
single-bag_wf
Rules used in proof : 
sqequalSubstitution, 
sqequalTransitivity, 
computationStep, 
sqequalReflexivity, 
isect_memberFormation, 
introduction, 
cut, 
extract_by_obid, 
sqequalHypSubstitution, 
isectElimination, 
thin, 
because_Cache, 
hypothesisEquality, 
hypothesis, 
productElimination, 
independent_isectElimination, 
lambdaFormation, 
sqequalRule, 
isect_memberEquality, 
axiomEquality, 
setElimination, 
rename, 
addEquality, 
applyEquality, 
lambdaEquality, 
natural_numberEquality, 
imageElimination, 
equalityTransitivity, 
equalitySymmetry, 
imageMemberEquality, 
baseClosed, 
instantiate, 
independent_functionElimination, 
intEquality, 
unionElimination, 
equalityElimination, 
dependent_set_memberEquality, 
independent_pairFormation, 
applyLambdaEquality, 
dependent_pairFormation, 
promote_hyp, 
dependent_functionElimination, 
cumulativity, 
voidElimination, 
universeEquality, 
voidEquality
Latex:
\mforall{}[X:Type].  \mforall{}[eq:EqDecider(X)].  \mforall{}[r:CRng].  \mforall{}[f,g:PowerSeries(X;r)].  \mforall{}[x,y:X].
    (ddf/dx/dy  =  ddf/dy/dx)
Date html generated:
2018_05_21-PM-10_17_20
Last ObjectModification:
2018_05_19-PM-04_19_12
Theory : power!series
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