SL(2) has no C1-extension to a half-space.

@article{Horne1974,
author = {Horne, J.G.},
journal = {Semigroup forum},
pages = {286-291},
title = {SL(2) has no C1-extension to a half-space.},
url = {http://eudml.org/doc/134011},
volume = {7},
year = {1974},
}

TY - JOUR
AU - Horne, J.G.
TI - SL(2) has no C1-extension to a half-space.
JO - Semigroup forum
PY - 1974
VL - 7
SP - 286
EP - 291
UR - http://eudml.org/doc/134011
ER -