I had heard from Manchester people that Harold was very ill, but the news of his death was still unexpected. I knew Harold from the many valuable conversations that I had with him when I was writing "Topology via Logic". He was always encouraging and helped me with quite a few technical issues of locale theory. I say "locale theory", but it's perhaps more accurate to describe his particular approach as that of a frame theorist. I remember him as someone enthusiastic for the intrinsic algebraic interest of frames, a part of which was about using the lattice theory to get a better understanding of point-set topology, and with no patience for the dual language of locales - that would be obfuscation, failure to call a spade a spade. Steve Vickers
On 11 Oct 2018, at 21:10, ptj@maths.cam.ac.uk wrote:
I imagine there are many on the categories mailing list who would want to know this sad news. I've known Harold ever since the first meeting of the Peripatetic Seminar (May 1976): he was one of the select few who attended both the first and the 100th meeting.
Peter Johnstone
---------- Forwarded message ---------- From: Andrea Schalk <A.Schalk@manchester.ac.uk> Sent: 10 October 2018 16:22:22 To: Nicola Gambino Subject: Harold
Dear all,
you have recently visited Harold, or expressed an interest in visiting him.
I'm afraid I have to tell you that he died this afternoon. I had no idea that this might happen so soon.
For the moment I don't know what else to say.
Andrea
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