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Angular momentum, convex Polyhedra and Algebraic Geometry

Published online by Cambridge University Press:  20 January 2009

M. F. Atiyah
Affiliation:
Mathematical Institute, 24-29 St. Giles, Oxford OX1 3LB, England
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The three families of classical groups of linear transformations (complex, orthogonal, symplectic) give rise to the three great branches of differential geometry (complex analytic, Riemannian and symplectic). Complex analytic geometry derives most of its interest from complex algebraic geometry, while symplectic geometry provides the general framework for Hamiltonian mechanics.

These three classical groups “intersect” in the unitary group and the three branches of differential geometry correspondingly “intersect” in Kähler geometry, which includes the study of algebraic varieties in projective space. This is the basic reason why Hodge was successful in applying Riemannian methods to algebraic geometry in his theory of harmonic forms.

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1983

References

REFERENCES

1.Atiyah, M. F., Convexity and commuting Hamiltonians, Bull. Land. Math. Soc. 14 (1982), 115.Google Scholar
2.Atiyah, M. F. and Bott, R., The Moment Map and Equivariant Cohomology Topology (to appear).Google Scholar
3.Atiyah, M. F. and Bott, R., The Yang-Mills equations over Riemann Surfaces, Phil. Trans. Roy. Soc. London A 308 (1982), 523615.Google Scholar
4.Bernstein, D., The number of roots of a system of equations, Funkt. Anal. Appl. 9:3 (1974), 14.Google Scholar
5.Duistermaat, J. J. and Heckman, G. J., On the variation in the cohomology in the symplectic form of the reduced phase space, Invent. Math. 69 (1982), 259268.Google Scholar
6.Guillemin, V. and Sternberg, S., Convexity properties of the moment mapping, Invent. Math. 67 (1982), 491513.Google Scholar
7.Horn, A., Doubly stochastic matrices and the diagonal of a rotation matrix, Amer. J. Math. 76 (1954), 620630.Google Scholar
8.Kirillov, A., Elements of the theory of representations (Springer, Berlin, 1976).Google Scholar
9.Kirwan, F., Sur la cohomologie des espaces quotients, C. R. Acad. Sci., Paris, 295 (1982), Serie I, 261264.Google Scholar
10.Kostant, B., On convexity, the Weyl group and the Iwasawa decomposition, Ann. Sci. Ec. Norm. Sup. 6 (1973), 413455.Google Scholar
11.Koushnirenko, A. G., The Newton polygon and the number of solutions of a system of k equations in k unknowns, Uspehi, Math. Nauk 30 (1975), 302303.Google Scholar
12.Mumford, D., Geometric Invariant Theory (2nd-edition) (Springer, Berlin, 1982).Google Scholar
13.Schur, I., Über eine Klasse von Mittelbildungen mit Anwendungen auf der Determinanten theorie, Sitzungsberichte der Berliner Mathematischen Gesellschaft 22 (1923), 920.Google Scholar