Dear Tim and All, This is a very sad news. I met Ronnie for the first time when I was a PhD student, while attending a conference he co-organized at the Razmadze Mathematics Institute of the Georgian Academy of Sciences in Tbilisi. During our discussions, he encouraged me to learn more about higher categorical structures. Ronnie pioneered many insights about the deep connections between higher structures and homotopy theory. He will be missed. Best wishes, Simona. Il 07/12/2024 18:14 GMT Timothy Porter <t.porter.maths@gmail.com> ha scritto: I have been asked by his son Marcus to inform his friends on the Categories mailing list that Ronnie Brown who was for many years professor at the University College of North Wales (later renamed the University of Bangor) died yesterday at his home in Deganwy. Please share this information with others who may have known Ronnie. Thanks, Tim Porter. 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>