secular sib npaug
Hauv cov kab sib txuas ntawm cov atomic orbitals rau hauv cov duab molecular, lub sijhawm sib luag yog hais txog cov qauv ntawm linear homogeneous kev sib npaug txog qhov sib xyaw coefficients. Cov xwm txheej uas cov txheej txheem ntawm kev sib npaug muaj kev daws teeb meem tsis yog txhua xoom yog tias tus txiav txim tsim los ntawm cov coefficients yog sib npaug nrog xoom, thiab qhov kev txiav txim siab no hu ua qhov kev txiav txim siab qhov ntev.