Tohoku Mathematical Journal
2026
March
SECOND SERIES VOL. 78, NO. 1

Tohoku Math. J.
78 (2026), 47-83

Title PULLBACK OF PRINCIPAL BUNDLES ALONG PROPER MORPHISMS

Author Indranil Biswas and Peter O'Sullivan

(Received September 20, 2023, revised April 2, 2024)
Abstract. We study the behaviour of principal bundles under pullback along proper surjective morphisms of either schemes over an algebraically closed field of characteristic 0 or complex analytic spaces.

Mathematics Subject Classification. Primary 14L30; Secondary 18F15, 18B40, 32L05.
Key words and phrases. Almost minimal reduction, groupoid, tensor category, pullback.

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