Expression 5: zeta left parenthesis, "s" , right parenthesis equals left brace, "s" equals 0 : negative .5 , "s" greater than 1 : zeta Subscript, "p" , Baseline left parenthesis, "s" , right parenthesis , "s" less than 1 : zeta Subscript, "m" , Baseline left parenthesis, "s" , right parenthesis , right braceζs=s=0:−.5,s>1:ζps,s<1:ζms
5
Expression 6: eta ( "s" ) equals left brace, "s" greater than or equal to 0.5 : eta Subscript, "p" , Baseline ( "s" ) , left parenthesis, 1 minus 2 Superscript, 1 minus "s" , Baseline , right parenthesis zeta left parenthesis, "s" , right parenthesis , right braceη(s)=s≥0.5:ηp(s),1−21−sζs