Living with Infinities

Details Living with Infinities Living with Infinities

2009-03-03

arxiv.org/abs/0903.0568v2

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, minor changes in text, many references added

Scientific paper

This is the written version of a talk given in memory of Gunnar K\"{a}ll\'{e}n, at the Departments of Theoretical Physics, Physics, and Astronomy of Lund University on February 13, 2009. It will be published in a collection of the papers of Gunnar K\"{a}ll\'{e}n, edited by C. Jarlskog and A. C. T. Wu. I discuss some of K\"{a}ll\'{e}n's work, especially regarding the problem of infinities in quantum field theory, and recount my own interactions with him. In addition, I describe for non-specialists the current status of the problem, and present my personal view on how it may be resolved in the future.

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