TY  - JOUR
AU  - Azagra Rueda, Daniel
AU  - Fry, Robb
AU  - Keener, L.
PY  - 2010
DO  - 10.1007/s00208-009-0441-6
SN  - 0025-5831
UR  - https://hdl.handle.net/20.500.14352/42082
T2  - Mathematische Annalen
AB  - Let X be a Banach space with a separable dual X*. Let Y subset of X be a closed subspace, and f : Y -> R a C(1)-smooth function. Then we show there is a C(1) extension of f to X.
LA  - eng
M2  - 285
PB  - Springer
KW  - Differentiable functions
KW  - closed-sets
KW  - c-m
KW  - approximation
KW  - subspaces
KW  - theorem
TI  - Smooth extensions of functions on separable Banach spaces
TY  - journal article
VL  - 347
ER  -