... c~p C c E C la mQt t~p l6i kh6ng gian tuye'n tinh dinh chu§'n E Gia slf F va G la hai anh Xc ;trong KA(X, C) saG cho t F ~ G KA(X, C) thl F co't ye'u ne'u va chi ne'u G c6t ye'u Chung minh ... p' , A E (0,1) Chung minh djnh Iy : Chung ta co th~ gia su Flau la di~m c6 dinh khong phV thuQctrong tru'ong hQp khong x§'y f)~t G: U -7 C la anh Xc;th~ng u -7 p * X6t ph6p d6ng luan compac ... d (1- A)-+ A[-+ My (t)] a a b - - f pqf ao (x, y, py ')dx y, py' )dxd s] == (1- d a A)-+ ANy(t) Trong do: M: K1Bo[0,1] -7 K1Bo[0,1] ydi: tIs b My (t) = f - op(s)o I - - ao f- aop(s)o Kko[0,1]={uEK1[0,1]...