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tractor bundle
In conformal geometry, the tractor bundle is a particular vector bundle constructed on a conformal manifold whose fibres form an effective representation of the conformal group (see associated bundle).
The term ''tractor'' is a portmanteau of "Tracy Thomas" and "twistor", the bundle having been introduced first by T. Y. Thomas as an alternative formulation of the Cartan conformal connection,〔Thomas, T. Y., "On conformal differential geometry", ''Proc. N.A.S.'' 12 (1926), 352–359; "Conformal tensors", Proc. N.A.S. 18 (1931), 103–189.〕 and later rediscovered within the formalism of local twistors and generalized to projective connections by Michael Eastwood ''et al.'' in 〔Bailey, T. N.; Eastwood, M. G.; Gover, A. R., "Thomas's structure bundle for conformal, projective and related structures", ''Rocky Mountain J.'' 24 (1994), 1191–1217.〕
==References==
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