Re: (toa'n) Mo^.t ba`i toa'n "tai tie^'ng"

[Gia Vuong Nguyen Chu <Gia.Vuong@gauss.math.jussieu.fr>]

Hi ba'c Hoang Linh,

On Fri, 19 Nov 1999, Hoang Linh wrote:

> Tuy nhie^n, ba`i ba'o to^i ddu+o+.c coi co' dda(ng ca? 2 dde^` (dde^` thi, va` 
> dde^` do tha`y "kho^'i tru+o+?ng" ra cho ho.c sinh tru+o+'c nga`y thi 2 ho^m), 
> va` to^i tha^'y qua? thu+.c 2 dde^` ddo' giop^'ng nhau tha^.t. Ba'c co' bie^'t 
> ke^'t lua^.n cuo^'i cu`ng ve^` vu. na`y ra sao kho^ng?
> 
> HLinh 

To^i kho^ng ro~ ke^'t lua^.n cuo^'i cu`ng ve^` vu. na`y (hoa(.c la` que^n
ro^`i thi` ddu'ng ho+n). Chi? nghe ke^'t qua? la` hie^.n gio+` tha^`y
Nguyen Vu Luong va^~n la` tru+o+?ng kho^'i. Mo^.t tha^`y ddang
kha? na(ng ddu+o+.c dde^` ba.t le^n (Bo^.) phu. tra'ch vie^.c tuye^? thi
ho.c sinh gio?i du+. thi IMO vi` chuye^.n na`y ne^n tho^i, ma^'y ngu+o+`i
nghe dda^u ddu+o+.c Bo^. go.i le^n tu+o+`ng tri`nh vi` ga^y ra tin na`y
dda~ tu+` cho^'i hoa(.c kho^ng co' ba(`ng chu+'ng cu. the^?, co' ngu+o+`i
(mo^.t gia'o vie^n Ha?i Pho`ng ?) nghe dda^u (la.i nge dda^u :-)) bi. ky?
lua^.t.   

To^i chi? nho+' loa'ng thoa'ng co' va^.y tho^i. Ba'c na`o co' nhie^`u
tho^ng tin ho+n co' the^? cho bie^'t ro~ ho+n kho^ng?

Du` sao theo y' kie^'n ca' nha^n to^i, kho^'i chuye^n toa'n A_0 kho^ng bao
gio+` dda(.t mu.c tie^u va`o chuye^.n thi Toa'n toa`n quo^'c ma` va`o
ddo+.t thi cho.n ddo^.i tuye^?n thi IMO.

Hy vo.ng pha^`n na`o tra? lo+`i ba'c,

Cheers,
____________________
Nguyen Chu Gia Vuong