TY - BOOK AU - Junge,Marius AU - Palazuelos,Carlos AU - Parcet,Javier AU - Perrin,Mathilde TI - Hypercontractivity in group Von Neumann algebras T2 - Memoirs of the American Mathematical Society SN - 9781470425654 (alk. paper) U1 - 510 23 PY - 2017/// CY - Providence : PB - American Mathematical Society KW - Von Neumann algebras KW - Group algebras N1 - Includes bibliographical references; 1. The combinatorial method -- 2. Optimal time estimates -- 3. Poisson-like lengths -- Appendix A. Logarithmic Sobolev inequalities -- Appendix B. The word length in $\mathbb {Z}_n$ -- Appendix C. Numerical analysis -- Appendix D. Technical inequalities -- Bibliography N2 - Provides a combinatorial/numerical method to establish new hypercontractivity estimates in group von Neumann algebras. The authors illustrate their method with free groups, triangular groups and finite cyclic groups, for which they obtain optimal time hypercontractive $L_2 \to L_q$ inequalities with respect to the Markov process given by the word length and with $q$ an even integer ER -