>Co' quye^?n sa'ch mo+'i va` de^~ ddo.c ma^'y thu+' na`y la`: D.Bertsekas, >Nonlinear programming, Athena Scientific, 1995. ISBN 1-886529-14-0. >Cheers, >tua^'n > Hi ba'c Tua^'n, Lie^.u co' ddi.a chi? na`o tre^n Net dde^? tui xem summary hay tha^.m chi' tri'ch 1 va`i chu+o+ng cu?a cuo^'n na`y kho^ng ba'c? Ca'm o+n ba'c nhie^`u. Quo^'c La^n.