Greetings to all, I've just updated my "professional" email address to this one. I'm using scare quotes because I officially retired from INRIA in January 2021. But most mathematicians never really retire, do they? So please delete whatever other email address you have for me in your address book. There are at least four of them. If there are more than one François Lamarches on this list, I'm the little guy with a loud voice who went to McGill. Keep on truckin', categorically François You're receiving this message because you're a member of the Categories mailing list group from Macquarie University. To take part in this conversation, reply all to this message. View group files<https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=files&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27> | Leave group<https://outlook.office365.com/owa/categories@mq.edu.au/groupsubscription.ashx?source=EscalatedMessage&action=leave&GuestId=6bf90c14-94d1-45b7-a0b5-9dd447734d27> | Learn more about Microsoft 365 Groups<https://aka.ms/o365g>