117654 20220711110510.0 doi 10.1007/978-3-030-75425-9_11 sideral 129082 ART-2021-129082 eng Grünbaum, F. A. Occupation Time for Classical and Quantum Walks 2021 This is a personal tribute to Lance Littlejohn on the occasion of his 70th birthday. It is meant as a present to him for many years of friendship. It is not written in the “Satz-Beweis” style of Edmund Landau or even in the format of a standard mathematics paper. It is rather an invitation to a fairly new, largely unexplored, topic in the hope that Lance will read it some afternoon and enjoy it. If he cares about complete proofs he will have to wait a bit longer; we almost have them but not in time for this volume. We hope that the figures will convince him and other readers that the phenomena displayed here are interesting enough. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/E48-20R info:eu-repo/grantAgreement/ES/DGA-FEDER/E26-17R info:eu-repo/grantAgreement/ES/MICINN-AEI-FEDER/MTM2017-89941-P info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Velázquez, L. Universidad de Zaragoza (orcid)0000-0002-3050-9540 Wilkening, J. 2005 595 Universidad de Zaragoza Dpto. Matemática Aplicada Área Matemática Aplicada 285 (2021), 197-212 Oper. theory Operator theory 0255-0156 1040706 http://zaguan.unizar.es/record/117654/files/texto_completo.pdf Postprint 1202220 http://zaguan.unizar.es/record/117654/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:117654 articulos driver 2022-07-11-08:48:30 ARTICLE