Dear Andre, You do deserve it. Speaking for myself, your monograph with Tierney was a huge influence on my own work: not only for its technical treatment, but also for the vigour with which it asserted the right of point-free spaces to the term “space”, unadorned, unqualified, with the implication that point-set spaces have been superseded as the subject of topology. It made me understand that my own book was hopelessly inadequate as an account of what point-free topology was for. At the time its insistence on working with the internal logic of elementary toposes stood out among point-free writings; yet it showed how to make the calculations topologically natural. In particular, by showing that internal lattices of opens are equivalent externally to bundles, it gave a natural way to think about constructive locale theory. Even today, that point is not widely enough understood. The monograph was a long time ago, and who am I to say how much was Joyal and how much Tierney? But in your work since I’ve always had the sense that the point-free topology was topology and not lattice theory. That broadens out much further in the recent topos-locos writings with Anel. And I haven’t even mentioned arithmetic universes! So, from my own perspective, you richly deserve the recognition of the Jeffery-Williams prize. Best wishes, Steve (Vickers)

On 25 Feb 2022, at 02:31, joyal.andre@uqam.ca wrote: Dear Steve,

Thank you.

I am not sure I deserve it more than so many others. I guess I am lucky. Unfortunately, there is no money attached! Anyway, I am please for the recognition.

Best wishes,

André

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