May God bless you and your...
I have fond memories of Karvel. He was a colleague of mine at Bell Labs and we published a couple of papers together on problems of high-field transport and a patent. He was a deep thinker and had a powerful toolkit of mathematical methods to solve very complex problem. He had a gentle nature and though very reserved his deep humanity and generosity of spirit was always in full display. My heartfelt condolences to his family
Federico Capasso, Cambridge, MA
February 16, 2020