theorem Th37:
for
X1,
X2 being non
empty set for
A being
Subset of
[:X1,X2:] for
f being
PartFunc of
[:X1,X2:],
ExtREAL for
x being
Element of
X1 for
y being
Element of
X2 for
F being
Functional_Sequence of
[:X1,X2:],
ExtREAL st
A c= dom f & ( for
n being
Nat holds
dom (F . n) = A ) & ( for
z being
Element of
[:X1,X2:] st
z in A holds
(
F # z is
convergent &
lim (F # z) = f . z ) ) holds
( ex
FX being
with_the_same_dom Functional_Sequence of
X1,
ExtREAL st
( ( for
n being
Nat holds
FX . n = ProjPMap2 (
(F . n),
y) ) & ( for
x being
Element of
X1 st
x in Y-section (
A,
y) holds
(
FX # x is
convergent &
(ProjPMap2 (f,y)) . x = lim (FX # x) ) ) ) & ex
FY being
with_the_same_dom Functional_Sequence of
X2,
ExtREAL st
( ( for
n being
Nat holds
FY . n = ProjPMap1 (
(F . n),
x) ) & ( for
y being
Element of
X2 st
y in X-section (
A,
x) holds
(
FY # y is
convergent &
(ProjPMap1 (f,x)) . y = lim (FY # y) ) ) ) )