2013-03-26 Jonathan Hogg Version 1.2.0. Switch from FD15 to F95 intrinisics. 2005-12-22 Version 1.1.1. Comments that referred to COMMON C removed. 2005-02-18 Version 1.1.0. FD05 dependence changed to FD15. Test for small off-diagonal entries altered to avoid use of extended precision. 2004-07-12 Version 1.0.0. Version numbering added. 2002-02-20 Cosmetic changes applied to reduce single/double differences 2001-05-03 Iain Duff Original version of EA22. Based on EA12 (1976)