Abstract
This is the second in a series of articles on a natural modification of the normal tractor connection on parabolic geometries, which naturally prolongs an underlying overdetermined system of invariant differential equations. We give a short review of the general procedure developed in Hammerl et al. (preprint) and then compute the prolongation covariant derivatives for a number of interesting examples in projective, conformal, and Grassmannian geometries.
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Bailey T.N., Eastwood M.G., Rod Gover A.: Thomas’s structure bundle for conformal, projective and related structures. Rocky Mt. J. Math. 24(4), 1191–1217 (1994)
Branson T., Čap A., Eastwood M., Gover A.R.: Prolongations of geometric overdetermined systems. Int. J. Math. 17(6), 641–664 (2006)
Calderbank D., Diemer T.: Differential invariants and curved Bernstein–Gelfand–Gelfand sequences. J. Reine Angew. Math. 537, 67–103 (2001)
Čap A.: Infinitesimal automorphisms and deformations of parabolic geometries. J. Eur. Math. Soc. 10(2), 415–437 (2008)
Čap A., Gover A.R.: Tractor calculi for parabolic geometries. Trans. Am. Math. Soc. 354(4), 1511–1548 (2002) (electronic)
Čap, A., Slovák, J.: Parabolic geometries. I. Background and general theory. Mathematical Surveys and Monographs, vol. 154. AMS (2009)
Čap A., Slovák J., Souček V.: Bernstein–Gelfand–Gelfand sequences. Ann. Math. 154(1), 97–113 (2001)
Dunajski M., Tod P.: Four-dimensional metrics conformal to Kähler. Math. Proc. Cambr. Phil. Soc. 148(3), 485–503 (2010)
Eastwood, M.: Notes on projective differential geometry. In: Symmetries and Overdetermined Systems of Partial Differential Equations, IMA Math Appl, vol. 144, pp. 41–60. Springer, New York (2008)
Eastwood, M., Matveev, V.: Metric connections in projective differential geometry. In: Symmetries and Overdetermined Systems of Partial Differential Equations, IMA Math Appl, vol. 144, pp. 339–350. Springer, New York (2008)
Gover A.R.: Invariant theory and calculus for conformal geometries. Adv. Math. 163, 206–257 (2001)
Gover A.R., Peterson L.J.: Conformally invariant powers of the Laplacian, Q-curvature, and tractor calculus. Commun. Math. Phys. 235(2), 339–378 (2003)
Gover A.R., Slovák J.: Invariant local twistor calculus for quaternionic structures and related geometries. J. Geom. Phys. 32(1), 14–56 (1999)
Gover A.R., Šilhan J.: The conformal Killing equation on forms—prolongations and applications. Differ. Geom. Appl. 26(3), 244–266 (2008)
Gover A.R., Somberg P., Souček V.: Young–Mills detour complexes and conformal geometry. Commun. Math. Phys. 278, 307–327 (2008)
Hammerl M.: Invariant prolongation of BGG-operators in conformal geometry. Arch. Math. (Brno) 44(5), 367–384 (2008)
Hammerl, M., Šilhan, J., Somberg, P., Souček, V.: On a new normalization for tractor covariant derivatives. arXiv:1003.6090v1 [math.DG] (preprint)
Kostant B.: Lie algebra cohomology and the generalized Borel-Weil theorem. Ann. Math. 74(2), 329–387 (1961)
Penrose, R., Rindler, W.: Spinors and space-time. In: Cambridge Monographs on Mathematical Physics, vol. 1. Cambridge University Press, Cambridge (1987). Two-Spinor Calculus and Relativistic Fields
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Hammerl, M., Somberg, P., Souček, V. et al. Invariant prolongation of overdetermined PDEs in projective, conformal, and Grassmannian geometry. Ann Glob Anal Geom 42, 121–145 (2012). https://doi.org/10.1007/s10455-011-9306-9
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DOI: https://doi.org/10.1007/s10455-011-9306-9
Keywords
- Parabolic geometry
- Prolongation of invariant PDE’s
- BGG sequence
- Tractor covariant derivatives
- Projective geometry
- Conformal geometry
- Grassmannian geometry