S\'eries hyperg\'eom\'etriques multiples et polyz\^etas
  We describe a theoretical and effective algorithm which enables us to prove that rather general hypergeometric series and integrals can be decomposed as linear combinations of multiple zeta values, with rational coefficients. 
Jacky Cresson (LMA - PAU), Stephane Fischler (LM-Orsay), Tanguy Rivoal   (IF)