F-a meaning

An Balieh CIP (Lity Aleppo O F A Tioch Rakka Emirate Of oDamascus Damascus 0103-1554) 'Caesare o Krak of the Desert ntreal =I Cairo ila prestige in the eyes of Europe.

Write also s l d1= D, so that f(a i a2+ p al, ...an+Ilan-1) =f +FLDif +F4 2 D2f + t i 3 D 3 f -}-....

;51, 2) = r F(ao, al, a2,...; xi, x2), the function F(a 01 a 1, a 2, ...

which have different coefficients, the same variables, and are of the same or different degrees in the variables; we may transform them all by the same substitution, so that they become _, _, _, _, _, _, f(a °, a, a 2, ...; (b 0, b, b 2, ...; 1, S2),....

�; S = r A F(a 0, 711, a2,���bo, b l, b 2,���9���; xl, x2), viz.