Oh no, Thomas Streicher, who was a great friend and mentor to me, passed way yesterday. Thomas was always very supportive (though often skeptical in a mentoring way), and brought me to Darmstadt, where I spent six wonderful years. He’s known for finding, with the also late Martin Hofmann, the groupoid model of Martin-Löf type theory. He saw it as a nonstandard model, but it paved the way for homotopy type theory and univalent mathematics. I will miss him dearly!
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@buchholtz I did not know Thomas personally but I fondly remember an informal chat while smoking outside Stereo in Glasgow after a workshop (?) he had attended. He was terribly interesting and seemed very kind.
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