let M be non empty MetrSpace; :: thesis: for S being non empty compact TopSpace
for T being non empty MetrSpace
for G being Subset of (Funcs ( the carrier of M, the carrier of T))
for H being non empty Subset of (MetricSpace_of_ContinuousFunctions (S,T)) st S = TopSpaceMetr M & T is complete & G = H holds
( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) )
let S be non empty compact TopSpace; :: thesis: for T being non empty MetrSpace
for G being Subset of (Funcs ( the carrier of M, the carrier of T))
for H being non empty Subset of (MetricSpace_of_ContinuousFunctions (S,T)) st S = TopSpaceMetr M & T is complete & G = H holds
( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) )
let T be non empty MetrSpace; :: thesis: for G being Subset of (Funcs ( the carrier of M, the carrier of T))
for H being non empty Subset of (MetricSpace_of_ContinuousFunctions (S,T)) st S = TopSpaceMetr M & T is complete & G = H holds
( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) )
let G be Subset of (Funcs ( the carrier of M, the carrier of T)); :: thesis: for H being non empty Subset of (MetricSpace_of_ContinuousFunctions (S,T)) st S = TopSpaceMetr M & T is complete & G = H holds
( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) )
let H be non empty Subset of (MetricSpace_of_ContinuousFunctions (S,T)); :: thesis: ( S = TopSpaceMetr M & T is complete & G = H implies ( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) ) )
assume A1: ( S = TopSpaceMetr M & T is complete ) ; :: thesis: ( not G = H or ( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) ) )
assume A2: G = H ; :: thesis: ( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) )
set Z = MetricSpace_of_ContinuousFunctions (S,T);
( (MetricSpace_of_ContinuousFunctions (S,T)) | H is totally_bounded iff Cl H is sequentially_compact ) by A1, Th14;
hence ( Cl H is sequentially_compact iff ( G is equicontinuous & ( for x being Point of S
for Hx being non empty Subset of T st Hx = { (f . x) where f is Function of S,T : f in H } holds
T | (Cl Hx) is compact ) ) ) by A1, A2, Th17; :: thesis: verum