chiom1=chi1*om1
chiom2=chi2*om2
facsig=om1*chiom1+om2*chiom2-2.0D0*om1om2*chiom12
- print *,"TUT?",om1*chiom1,facsig,om1,om2,om12
+! print *,"TUT?",om1*chiom1,facsig,om1,om2,om12
sigsq=1.0D0-facsig*faceps1_inv
sigsq_om1=(chiom1-chiom12*om2)*faceps1_inv
sigsq_om2=(chiom2-chiom12*om1)*faceps1_inv