[texworks] mathematic

[vaillantj]

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condition of hyperbolicity



-- 
Jean Vaillant
Professeur émérite
Institut de mathématiques de Jussieu
Université Paris VI
BC 247
4 Place Jussieu
75252 PARIS CEDEX 05
FRANCE
Tél    33 (O) 1 44275332
fax    33 (0) 1 44275332