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AN OVERVIEW OF VARIOUS OCCURRENCES OF GENERAL EXPRESSIONS FOR THE COEFFICIENTS OF LOVELOCK LAGRANGIANS AND FOR LOVELOCK TENSORS FROM THE 0th TO THE 5th ORDER IN CURVATURE C. C. Briggs Center for Academic Computing, Penn State University, University Park, PA 16802 Wednesday, March 22, 2000 Abstract. An overview is given of various occurrences of general expressions for the coefficients of Lovelock Lagrangians and for Lovelock tensors from the 0th to the 5th order in curvature in terms of the Riemann-Christoffel and Ricci curvature tensors and the Riemann curvature scalar for n-dimensional differentiable manifolds having a general linear connection. PACS numbers: 02.40.-k, 04.20.Cv, 04.20.Fy “The quintic Lovelock tensor has only recently been evaluated.” curvature tensors and Riemann curvature scalar for n-dimensional — Davis, S., “Symmetric Variations of the Metric and Extrema differentiable manifolds having a general linear connection, where the of the Action for Pure Gravity,” Gen. Rel. Grav., 30 (1998) 345. d 80 Riemann-Christoffel curvature tensor Rabc is given by INTRODUCTION d ≡ ∂ Γ d Γ d Γ e Ω e Γ d Rabc 2 ( [a b] c + [a |e| b] c + a b e c), (1) This paper presents an overview of various occurrences of general b the Ricci curvature tensor Ra by 1-3 expressions for the coefficients L(p) of Lovelock Lagrangians (also called b ≡ bc = − bc = − cb + ∇ bc + d bc Ra Rca Rac Rca 2 ( [c Qa] Sca Qd ), (2) “Euler densities,”4-5 “dimensionally continued Euler forms,”6-8 “sectional and the Riemann curvature scalar R by curvatures,”9-13 “Gauss curvature forms,”14-16 “Gauss-Bonnet forms,”17-19 ≡ a = ab = − ab = ba = − ba “Gauss-Kronecker curvatures,”20-52 “Lipschitz-Killing curvatures,”53-74 each R Ra Rba Rab Rab Rba , (3) 75-76 77 ∂ Γ b Ω b of the latter two as distinct from the other, etc.) and for Lovelock tensors where a is the Pfaffian derivative, a c the connection coefficient, a c the b 78-79 bc c G(p)a (also called “generalized Einstein curvature tensors,” etc.) from the object of anholonomity, Qa the non-metricity tensor, and Sab the torsion 0th to the 5th order in curvature in terms of the Riemann-Christoffel and Ricci tensor. 1 Mena Marugán, G. A., “Dynamically generated four-dimensional models in Lovelock cosmology,” Phys. Rev. D, 46 (1992) 4340. 2 Demaret, J., Y. De Rop, P. Tombal, and A. Moussiaux, “Qualitative Analysis of Ten-Dimensional Lovelock Cosmological Models,” Gen. Rel. Grav., 24 (1992) 1169. 3 Verwimp, T., “Unified prescription for the generation of electroweak and gravitational gauge field Lagrangian on a principal fiber bundle,” Journ. Math. Phys., 31 (1990) 3047. 4 Euler, L., “Recherches sur la courbure des surfaces,” Mémoires de l’académie [sic] des sciences de Berlin, 1767, 16 (1760) 119. 5 Mardones, A., and J. Zanelli, “Lovelock-Cartan theory of gravity,” Class. Quantum Grav., 8 (1991) 1545. 6 Müller-Hoissen, F., “Dimensionally continued Euler forms: Kaluza-Klein cosmology and dimensional reduction,” Class. Quantum Grav., 3 (1986) 665. 7 Arik, M., E. Hizel, and A. Mostafazadeh, “The Schwarzschild solution in non-Abelian Kaluza-Klein theory,” Class. Quantum Grav., 7 (1990) 1425. 8 Dereli, T., and G. 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Fourier, Grenoble, 47 (1997) 1209. 39 Qingming, C., “Hypersurfaces With [sic] Constant Quasi-Gauss-Kronecker Curvature in S4(1),” Advances in Mathematics (China), 22 (1993) 125. 40 Ramanathan, J., “Minimal hypersurfaces in S4 with vanishing Gauss-Kronecker curvature,” Mathematische Zeitschrift, 205 (1990) 645. 41 Ros, A., “Compact Hypersurfaces with Constant Scalar Curvature and a Congruence Theorem,” Journ. Diff. Geom., 27 (1988) 215. 42 Rosenberg, H., and J. Spruck, “On the Existence of Convex Hypersurfaces of Constant Gauss Curvature in Hyperbolic Space,” Journ. Diff. Geom., 40 (1994) 379. 43 Schmuckenschlaeger, M., “A Simple Proof of an Approximation Theorem of H. Minkowski,” Geometriae Dedicata, 48 (1993) 319. 44 Schneider, R., “Polyhedral Approximation of Smooth Convex Bodies,” Journal of Mathematical Analysis and Applications, 128 (1987) 470. 2 Wednesday, March 22, 2000 Z-26 81 δb = In accordance with various general definitions given by Müller-Hoissen a,ifp 0 G b = (5) 82 b (p)a (2 p + 1)! and Verwimp, L and G are given, using anholonomic coordinates, by δ b i1i2 i3i4 i2 p − 1i2 p > (p) (p)a p + 1 [a Ri i Ri i … Ri i ] ,ifp 0 = 2 p 1 2 3 4 2 p − 1 2 p 1, if p 0 cd = ce d δb = respectively, where Rab g Rabe and a is the Kronecker delta. L(p) (2p)! (4) i1i2 i3i4 i2p − 1i2p > b p R R … R ,ifp 0 Some numerical properties of L and G for 0 ≤ p ≤ 5 appear in Tables 2 [i1i2 i3i4 i2p − 1i2p] (p) (p)a and 1 and 2 (see below). Complete expressions and the overview follow. ≤ ≤ b ≤ ≤ TABLE 1. SOME NUMERICAL PROPERTIES OF L(p) FOR 0 p 5. TABLE 2. SOME NUMERICAL PROPERTIES OF G(p)a FOR 0 p 5. ORDER QUANTITY NUMBER OF NUMBER OF PERMUTA- SUM OF NUMERICAL ORDER QUANTITY NUMBER OF NUMBER OF PERMUTA- SUM OF NUMERICAL TERMS TIONS COMPREHENDED FACTORS TERMS TIONS COMPREHENDED FACTORS b 0 L(0) 1 110G(0)a 1 11 b 1 1 L(1) 1 211G(1)a 2 61 2 b 1 2 L(2) 3 24 6 2 G(2)a 7 120 7 2 b 3 L(3) 8 720 90 3 G(3)a 26 5040 105 b 4 L(4) 25 40,320 2520 4 G(4)a 115 362,880 2835 b 5 L(5) 85 3,628,800 113,400 5 G(5)a 596 39,916,800 124,740 45 Schneider, R., and J.