... 1Ch’u’ong 2. Khˆong gian ¯di.nh chu’ˆan10. Cho A, B l`a hai to´an t’’u t´ıch phˆan trong C[a,b]v´’oi ha.ch l`ˆan l’u’o.t l`a K(t, s), H(t, ... h`am x(s) liˆen tu.c trˆen[a, b] nˆen h`am H(t, u)K(u, s)x(s) liˆen tu.c trˆen {a ≤ u, s ≤ b}. Thay ¯d’ˆoi th´’u t’u.l´ˆay t´ıchphˆan ta ¯d’u’o.cBAx(t) =babaH(t, u)K(u, s)x(s)duds =ba(H(t,...