tree d28a79e969a31a2bf70549d11b1a5938fdbd7828
parent 9da41cc527ec595feb3377d089db6cd3adc9a5c8
author Chen-Pang He <jdh8@ms63.hinet.net> 1346341230 +0800
committer Chen-Pang He <jdh8@ms63.hinet.net> 1346341230 +0800

Avoid inefficient 2x2 LU. Move atanh to internal for maintainability.