He was favoured by Ibn uz-Zaiyat, the vizier of the caliph Wathiq.
If the liquid is reduced to rest at infinity by the superposition of an opposite stream given by w = - Uz, we are left with w = Ua2/z, (6) =U(a 2 /r) cos 0= Ua2x/(x2+y2), (7) 4, = -U(a 2 /r) sin 0= -Ua2y/( x2+y2), (8) giving the motion due to the passage of the cylinder r=a with velocity U through the origin 0 in the direction Ox.
Qais ur-Rugayyat was the poet of `Abdallah ibn uz-Zubair (Abdallah ibn Zobair) and helped him until circumstances went against him, when he made his peace with the caliph.
Io vols., Bulaq, 1890), founded on the Qamus, by Murtada uz-Zabidi (1732-1790).
After Saladin's death Beha-ud-Din remained the friend of his son Malik uz-Zahir, who appointed him judge of Aleppo.
When Malik uz-Zahir died, his son Malik ul-`Aziz was a minor, and Beha ud-Din had the chief power in the regency.
From the equivalence of a small rotation to a localized vector it follows that the rotation ~ will be equivalent to rotations E,ii, ~ about Ox, Oy, Uz, respectively, provided = le, s1 = me, i nc (I) and we note that li+,72+l~Z~i (2)
Uz (dittogr. ?); " Settler in the Land!
Ch S u ?uz ' Mu lim to.
T.) ABU-L-Qasim [Khalaf ibn `Abbas uz-Zahrawi], Arabian physician and surgeon, generally known in Europe as Abulcasis, flourished in the tenth century at Cordova as physician to the caliph `Abdur-Rahman III.