Picard Groups, Grothendieck Rings, and B
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J.P. May
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Article
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2001
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Elsevier Science
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English
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for spurring me to write these observations, and I thank Halvard Fausk and Gaunce Lewis for careful readings of several drafts and many helpful comments. I thank Madhav Nori and Hyman Bass for help with the ring theory examples and Peter Freyd, Michael Boardman, and Neil Strickland for facts about c