Pisier transformed the area of operator spaces. In the 1990s, he solved two long-standing open problems. In the theory of C*-algebras, he solved, jointly with Marius Junge, the problem of the uniqueness of C* -norms on the tensor product of two copies of B(H), the bounded linear operators on a Hilbert spaceH. He and Junge were able to produce two such tensor norms that are nonequivalent.[3] In 1997, he constructed an operator that was polynomially bounded but not similar to a contraction, answering a famous question of Paul Halmos.
Awards
He was an invited speaker at the 1983 ICM[6] and
a plenary speaker at the 1998 ICM.[7][8] In 1997, Pisier received the Ostrowski Prize for this work. He is also a recipient of the Grands Prix de l'Académie des Sciences de Paris in 1992 and the Salem Prize in 1979.[9] In 2012 he became a fellow of the American Mathematical Society.[10]
Pisier, Gilles (1989). The volume of convex bodies and Banach space geometry. Cambridge: Cambridge University Press. ISBN0-521-36465-5. OCLC19130153.[11]
Pisier, Gilles (1996). The operator Hilbert space OH, complex interpolation and tensor norms. Providence, Rhode Island. ISBN978-1-4704-0170-2. OCLC891396783.{{cite book}}: CS1 maint: location missing publisher (link)
Pisier, Gilles; Conference Board of the Mathematical Sciences (1986). Factorization of linear operators and geometry of Banach spaces. Providence, R.I.: Published for the Conference Board of the Mathematical Sciences by the American Mathematical Society. ISBN0-8218-0710-2. OCLC12419949.
Marcus, Michael B.; Pisier, Gilles (31 December 1982). Random Fourier Series with Applications to Harmonic Analysis. (AM-101). Princeton University Press. doi:10.1515/9781400881536. ISBN978-1-4008-8153-6.[12]