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I spent my sabbatical leave at Kent State University in 1992-1993.
I had this chance to be in his graduate course, and I learned many interesting material in Banach space theory. I owed him some part of my
Academic career. God rest him.

Posted by: Jafar Zafarani - Isfahan, Iran, OH - Student   Aug 11, 2020

Sorry for your loss.
Joseph Diestel was a great Professor and better friend.
Joseph Diestel from KSU, was Visiting Professor at Central University of Venezuela for many periods and organizer of the International Research Workshop on Banach Space Theory held at Mérida (Venezuela) on 1992. Thanks to him for his many lectures delivered during the 90's and his valuable teachings, also in many conversations and personal communications.
May God bless you and your family in this time of sorrow,

Posted by: Alexi Quevedo - Caracas - friend   Jun 28, 2018

My husband Doug and I were neighbors of the Diestel family, when living on Akron Blvd, many years ago when my husband student at KSU, I remember the children as well as Joe and Linda well, yes we tipped some beers with them, and as I recall Linda was a good cook. Always liked his story about never driving a vehicle and the baby chickens at the home of his grandparents, a story I am sure you know well. I

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Posted by: Ursula and Doug McCormick - Bedford, IN - friend   May 09, 2018

I only got to know prof. Diestel through his mathematical writing; an inspiration and a breath of fresh air. His was a life that touched many.

Posted by: Ales Cerny - London, UK - Student   Oct 21, 2017

Sorry for your loss. Have not seen Joe since undergrad days at UD and studying math together and hanging out on Brown streedt. he was a great guy as an undergrad.

Posted by: Bill Gottschall - Dayton, OH   Sep 26, 2017

In this sad occasion, I would like to express my sincere condolences to Professor Joseph Diestel's family and faculty members of Kent State University. We all admit that one of his capabilities was to persuade novice researchers in the area of Geometry of Banach spaces and generously provide them with new ideas.

I feel obliged to hereby pay tribute to him and his outstanding good human being.

Posted by: Jafar Zafarani - Isfahan   Sep 10, 2017

Joe was the most inspiring of my many teachers. You just knew that you were in the presence of greatness and he was happy to share it with you. It must have been a real adjustment coming to Ireland, but it was not visible to us. What still awes me is the genius of the exam he set - I still have to think a little when I read it. The care he took to produce something that taught as

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Posted by: Declan Quinn - Syracuse, NY - Friend   Aug 27, 2017

Joe taught me 40 years ago while he was on a Fulbright in Ireland. What a character! We'd never encountered anything like him. We'd recently seen One Flew Over the Cuckoo's Nest, and Joe's zest for life, smarts, and irreverence had me for one wondering if we were being educated on the finer points of mathematical analysis by our very own Jack Nicholson.

He seemed like the kind of guy you could trust with your life, or your future, and

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Posted by: Colm Mulcahy - Student   Aug 26, 2017

I met Joe only at an extended family gathering. I was impressed . Please accept my deepest sympathy.

Posted by: Tom Gauldin - Washington Court House, OH - Family   Aug 25, 2017

Joe was a brilliant man. He was generous and kind. A man who inspired students, attracted geniuses and welcomed anyone with a sense of humour to share in a world, gentler, more authentic and supportive than the usual one : Joe's World.
I'll miss you Joe - the world has dimmed with your passing.

Posted by: Mark Leeney - Donegal, Ireland - Friend   Aug 25, 2017