Abstract
Penrose’s crucial contributions to General Relativity, symbolized by his 1965 singularity theorem, received (half of) the 2020 Nobel prize in Physics. A renewed interest in the ideas and implications behind that theorem, its later developments, and other Penrose’s ideas improving our understanding of the gravitational field thereby emerged. In this paper I highlight some of the advancements motivated by the theorem that were developed over the years. I also identify some common misconceptions about the theorem’s implications. A modern perspective on the concept of closed trapped submanifolds, based on the mean curvature vector, is advocated.
Similar content being viewed by others
Availability of data and materials
Data sharing not applicable to this article as no datasets were generated or analysed during the current study
Notes
Vacuum or electromagnetic plane waves’ Ricci tensor takes the form \(R_{\mu \nu }= -(A(u)+C(u)) k_\mu k_\nu \) where \(k^\mu \) is the parallel vector field of the spacetime
The original definition is still used in most of the physics literature, and in a large part of the mathematical one. The reasons behind this are obscure to me. The characterization with the mean curvature vector is clearly neater and provides more information, apart from unifying the concept for arbitrary dimensional manifolds. A (future) trapped submanifold has all possible (future) expansions negative, not only the null expansions. Moreover, the computation of null expansions and the choice of null directions complicates the explicit calculations. Computing the mean curvature vector is far simpler! [136]
Here, what I mean by the ‘boundary of the future’ of \(\zeta \) is \(E^+(\zeta )\) [72, 73, 121, 135], defined as the set of points that can be reached from \(\zeta \) causally, but not through a timelike curve. If \(E^+(\zeta )\) is compact, then \(\zeta \) is a trapped set. Not to be confused with a trapped submanifold. Trapped submanifolds become trapped sets precisely under the appropriate curvature condition –if spacetime is null complete–, as explained in the text.
If one prefers the traditional notion with negative expansions, they are also strict inequalities
References
Aazami, A.B., Javaloyes, M.A.: Penrose’s singularity theorem in a Finsler spacetime Class. Quantum Gravit. 33, 025003 (2016)
Andersson, L., Blue, P., Wyatt, Z., Yau, S.-T.: Global stability of spacetimes with supersymmetric compactifications (2020) arXiv:2006.00824
Andersson, L., Mars, M., Simon, W.: Local existence of dynamical and trapping horizons. Phys. Rev. Lett. 95, 111102 (2005)
Andersson, L., Mars, M., Simon, W.: Stability of marginally outer trapped surfaces and existence of marginally outer trapped tubes. Adv. Theor. Math. Phys. 12, 853 (2008)
Andersson, L., Mars, M., Metzger, J., Simon, W.: The time evolution of marginally trapped surfaces. Class. Quantum Gravit. 26, 085018 (2009)
Ashtekar, A., Krishnan, B.: Isolated and dynamical horizons and their applications. Living Rev. Relativ. 7, 10 (2004)
Ashtekar, A., Galloway, G.J.: Some uniqueness results for dynamical horizons. Adv. Theor. Math. Phys. 9, 1 (2005)
Barceló, C., Liberati, S., Visser, M.: Analogue gravity. Living Rev. Relativ. 14, 3 (2011)
Baumgarte, T.W., Shapiro, S.L.: Numerical Relativity: Solving Einstein’s Equations on the Computer. Cambridge University Press, Cambridge (2010)
Beem, J.K., Ehrlich, P.E., Easley, K.L.: Global Lorentzian Geomertry, Pure and Applied Mathematics, vol. 202. Marcel Dekker, New York (1996)
Bengtsson, I.: Some examples of trapped surfaces, Chapter 9 in [75] (2013)
Bengtsson, I., Senovilla, J.M.M.: Region with trapped surfaces in spherical symmetry, its core, and their boundaries. Phys. Rev. D 83, 044012 (2011)
Bernal, A.N., Sánchez, M.: On smooth Cauchy hypersurfaces and Geroch’s splitting theorem. Commun. Math. Phys. 243, 461–70 (2003)
Bernal, A.N., Sánchez, M.: Smoothness of time functions and the metric splitting of globally hyperbolic spacetimes. Commun. Math. Phys. 257, 43–50 (2005)
Bernal, A.N., Sánchez, M.: Globally hyperbolic spacetimes can be defined as ‘causal’ instead of ‘strongly causal’. Class. Quantum Gravit. 24, 745–49 (2007)
Bojowald, M.: Singularities and quantum gravity (lecture course at the XIIth Brazilian School on Cosmology and Gravitation 2006). AIP Conf. Proc. 910, 294–333 (2007)
Booth, I.: Black hole boundaries. Can. J. Phys. 83, 1073–1099 (2005)
Borde, A., Vilenkin, A.: Singularities in inflationary cosmology: a review. Int. J. Mod. Phys. D 5, 813 (1996)
Branding, V., Fajman, D., Kröncke, K.: Stable cosmological Kaluza–Klein spacetimes. Commun. Math. Phys. 368, 1087–120 (2019)
Carroll, S.M., Geddes, J., Hoffman, M.B., Wald, R.M.: Classical stabilization of homogeneous extra dimensions. Phys. Rev. D 66, 024036 (2002)
Carter, B.: Causal structure in space-time. Gen. Relativ. Gravit. 1, 349 (1971)
Chinea, F.J., Fernández-Jambrina, L., Senovilla, J.M.M.: Singularity-free space-time. Phys. Rev. D 45, 481 (1992)
Choquet-Bruhat, Y., Geroch, R.: Global aspects of the Cauchy problem in general relativity. Commun. Math. Phys. 14, 329–35 (1969)
Christodoulou, D.: The Formation of Black Holes in General Relativity, EMS Monographs in Mathematics. European Mathematics, Soc (Zürich) (2009).. (arXiv:0805.3880)
Chruściel, P.T., Li, Y., Weinstein, G.: Mass and angular-momentum inequalities for axi-symmetric initial data sets: II. Angular-Momentum Ann. Phys. 323, 2591–2613 (2008)
Cipriani, N., Senovilla, J.M.M.: Singularity theorems for warped products and the stability of spatial extra dimensions. JHEP 04, 175 (2019)
Clarke, C.J.S.: The Analysis of Space-Time Singularities, (Cambridge Lectures Notes in Physics 1, Cambridge) (1993)
Clarke, C.J.S., Schmidt, B.G.: Singularities: the state of the art. Gen. Relativ. Gravit. 8, 129 (1977)
Claudel, C.-M.: Black holes and closed trapped surfaces: a revision of a classic theorem. arXiv:gr-qc/0005031 (2000)
Dafermos, M.: Spherically symmetric spacetimes with a trapped surface. Class. Quantum Gravit. 22, 2221–2232 (2005)
Dafermos, M., Luk, J.: The interior of dynamical vacuum black holes I: The \(C^0\)-stability of the Kerr Cauchy horizon. arXiv: 1710.01722 (2017)
Dain, S.: Angular-momentum mass inequality for axisymmetric black holes. Phys. Rev. Lett. 96, 101101 (2006)
Dain, S.: Proof of the angular momentum-mass inequality for axisymmetric black holes. J. Differ. Geom. 79, 33–67 (2008)
Dain, S.: Geometric inequalities for axially symmetric black holes. Class. Quantum Gravit. 29, 073001 (2012)
Dain, S., Jaramillo, J.L., Reiris, M.: Area-charge inequality for black holes. Class Quantum Gravit. 29, 035013 (2012)
Dain, S., Reiris, M.: Area-angular-momentum inequality for axisymmetric black holes. Phys. Rev. Lett. 107, 051101 (2011)
Eichmair, M.: The Plateau problem for marginally trapped surfaces. J. Differ. Geom. 83, 551–584 (2009)
Einstein, A.: Kosmologische Betrachtungen zur allgemeinen Relativitätstheorie, Sitzungsber. Preuss. Akad. Wiss. phys.-math Klasse VI 142–152 (1917)
Exton, A.R., Newman, E.T., Penrose, R.: Conserved quantities in the Einstein–Maxwell theory. J. Math. Phys. 10, 1566–70 (1969)
Fayos, F., Martín-Prats, M.M., Senovilla, J.M.M.: On the extension of Vaidya and Vaidya–Reissner–Nordström spacetimes. Class. Quantum Gravit. 12, 2565–2576 (1995)
Fayos, F., Senovilla, J.M.M., Torres, R.: General matching of two spherically symmetric spacetimes. Phys. Rev. D 54, 4862 (1996)
Flores, J.L.: The causal boundary of spacetimes revisited. Commun. Math. Phys. 276, 611–643 (2007)
Flores, J.L., Harris, S.G.: Topology of the causal boundary for standard static spacetimes. Class. Quantum Gravit. 24, 1211–1260 (2007)
Flores, J.L., Herrera, J., Sánchez, M.: Isocausal spacetimes may have different causal boundaries. Class. Quantum Gravit. 28, 175016 (2011)
Flores, J.L., Herrera, J., Sánchez, M.: On the final definition of the causal boundary and its relation with the conformal boundary. Adv. Theor. Math. Phys. 15, 991–1057 (2011)
Flores, J.L., Herrera, J., Sánchez, M.: Gromov, Cauchy and causal boundaries for Riemannian, Finslerian and Lorentzian manifolds. Mem. Am. Math. Soc. 226(1064) (2013)
Flores, J.L., Sánchez, M.: Causality and conjugate points in general plane waves. Class. Quantum Gravit. 20, 2275–91 (2003)
Fourès-Bruhat, Y.: Théorèm d’existence pour certain systèmes d’équations aux derivées partielles non linéaires. Acta Math. 88, 141–225 (1952)
Frauendiener, J.: Conformal infinity. Living Rev. Relativ. 7, 1 (2004)
Gabach Clement, M.E., Jaramillo, J.L., Reiris, M.: Proof of the area-angular momentum-charge inequality for axisymmetric black holes. Class. Quantum Gravit. 30, 065017 (2013)
Galloway, G.J., Senovilla, J.M.M.: Singularity theorems based on trapped submanifolds of arbitrary co-dimension. Class Quantum Gravit. 27, 152002 (2010)
García-Parrado, A., Sánchez, M.: Further properties of causal relationship: causal structure stability, new criteria for isocausality and counterexamples. Class. Quantum Gravit. 22, 4589–619 (2005)
García-Parrado, A., Senovilla, J.M.M.: Causal relationship: a new tool for the causal characterization of Lorentzian manifolds. Class. Quantum Gravit. 20, 625–64 (2003)
García-Parrado, A., Senovilla, J.M.M.: Causal structures and causal boundaries. Class. Quantum Gravit. 22, R1–R84 (2005)
Garfinkle, D., Harris, S.G.: Ricci fall-off in static and stationary, globally hyperbolic, non-singular spacetimes. Class. Quantum Gravit. 14, 139 (1997)
Geroch, R.P.: Singularities in closed universes. Phys. Rev. Lett. 17, 445 (1966)
Geroch, R.P.: What is a singularity in general relativity? Ann. Phys. (N.Y.) 48, 526 (1968)
Geroch, R.P.: Domain of dependence. J. Math. Phys. 11, 437 (1970)
Geroch, R.P., Kronheimer, E.H., Penrose, R.: Ideal points in space-time. Proc. R. Soc. Lond. A 327, 545 (1972)
Gibbons, G.W.: The isoperimetric and Bogomolny inequalities for black holes, In: Global Riemannian Geometry edited by Willmore T. J. and Hitchin N. J. (Ellis Harwood, Chichester), p. 194 (1984)
Gibbons, G.W.: Collapsing shells and the isoperimetric inequality. CQG 14, 2905 (1997)
Graf, M.: Singularity theorems for \(C^1\)-Lorentzian metrics. Commun. Math. Phys. 378, 1417–1450 (2020)
Graf, M., Grant, J.D.E., Kunzinger, M., Steinbauer, R.: The Hawking-Penrose singularity theorem for \(C^{1,1}\)-Lorentzian metrics. Commun. Math. Phys. 360, 1009–1042 (2018)
Griffiths, J.B.: Colliding Plane Waves in General Relativity. Oxford University Press, Oxford (1991)
Griffiths, J.B., Podolský, J.: Exact Spacetimes in Einstein’s General Relativity. Cambridge University Press (2009)
Hawking, S.W.: Occurrence of singularities in open universes. Phys. Rev. Lett. 15, 689 (1965)
Hawking, S.W.: Singularities in the Universe. Phys. Rev. Lett. 17, 443 (1966)
Hawking, S.W.: The occurrence of singularities in Cosmology. I. Proc. R. Soc. Lond. A 294, 511 (1966)
Hawking, S.W.: The occurrence of singularities in Cosmology. II. Proc. R. Soc. Lond. A 295, 490 (1966)
Hawking, S.W.: The occurrence of singularities in cosmology. III. Causality and singularities. Proc. R. Soc. Lond. A 300, 187 (1967)
Hawking, S.W.: Black holes in general relativity. Commun. Math. Phys. 25, 152 (1972)
Hawking, S.W., Ellis, G.F.R.: The Large Scale Structure of Space-Time. Cambridge University Press, Cambridge (1973)
Hawking, S.W., Penrose, R.: The singularities of gravitational collapse and cosmology. Proc. R. Soc. Lond. A 314, 529 (1970)
Hayward, S.A.: General laws of black-hole dynamics. Phys. Rev. D 49, 6467 (1994)
Hayward, S.A. (ed.): Black Holes: New Horizons. World Scientific, Singapore (2013)
Israel, W.: Gravitational collapse of a radiating star. Phys. Lett. A 24, 184–6 (1967)
Jaramillo, J.L.: An Introduction to Local Black Hole Horizons in the 3+1 Approach to General Relativity. Chapter 1 in [75] (2013)
Jaramillo, J.L., Reiris, M., Dain, S.: Black hole area-angular momentum inequality in non-vacuum spacetimes. Phys. Rev. D 84, 121503(R) (2011)
Jaramillo, J.L., Valiente Kroon, J.A., Gourgoulhon, E.: From geometry to numerics: interdisciplinary aspects in mathematical and numerical relativity. Class. Quantum Gravit. 25, 093001 (2008)
Kánnár, J., Rácz, I.: On the strength of space-time singularities. J. Math. Phys. 33, 2842–2848 (1992)
Khan, K., Penrose, R.: Scattering of two impulsive gravitational plane waves. Nature 229, 185–186 (1971)
Klainerman, S., Rodnianski, I.: On the formation of trapped surfaces. Acta Math. 208, 211–333 (2012)
Komar, A.: Necessity of singularities in the solution of the field equations of general relativity. Phys. Rev. 104, 544 (1956)
Kriele, M.: Spacetime. Springer, Berlin (1999)
Kronheimer, E.H., Penrose, R.: On the structure of causal spaces. Proc. Camb. Philos. Soc. 63, 481 (1967)
Kunzinger, M., Ohanyan, A., Schinnerl, B., Steinbauer, R.: The Hawking–Penrose singularity theorem for \(C^1\)-Lorentzian metrics. arXiv:2110.09176 (2022)
Kunzinger, M., Steinbauer, R., Stojković, M., Vickers, J.A.: A regularisation approach to causality theory for \(C^{1,1}\) Lorentzian metrics. Gen. Relativ. Gravit. 46, 1738 (2014)
Kunzinger, M., Steinbauer, R., Stojković, M., Vickers, J.A.: Hawking’s singularity theorem for \(C^{1,1}\)-metrics. Class. Quantum Gravit. 32, 075012 (2015)
Kunzinger, M., Steinbauer, R., Vickers, J.A.: The Penrose singularity theorem in regularity \(C^{1,1}\). Class. Quantum Gravit. 32, 155010 (2015)
Landsman, K.: Penrose’s 1965 singularity theorem: From geodesic incompleteness to cosmic censorship. Gen. Relativ. Gravit. 54, 115 (2022)
Leray, J.: Hyperbolic Differential Equations, Institute for Advanced Study, (Princeton Preprint) (1952)
Lesourd, M.: A new singularity theorem for black holes which allows chronology violation in the interior. Class. Quantum Gravit. 35, 245003 (2018)
Maeda, H.: Quest for realistic non-singular black-hole geometries: regular-center type. arXiv:2107.04791 (2021)
Malec, E.: Isoperimetric inequalities in the physics of black holes. Acta Phys. Pol. B 22, 829–858 (1991)
Mars, M.: Present status of the Penrose inequality. Class. Quantum Gravit. 26, 193001 (2009)
Mars, M., Martín-Prats, M.M., Senovilla, J.M.M.: Models of regular Schwarzschild black holes satisfying weak energy conditions. Class. Quantum Gravit. 13, L51–L58 (1996)
Mars, M., Senovilla, J.M.M.: Geometry of general hypersurfaces in spacetime: junction conditions. Class. Quantum Gravit. 10, 1865–1897 (1993)
Mars, M., Senovilla, J.M.M.: Trapped surfaces and symmetries. Class. Quantum Gravit. 20, L293 (2003)
Minguzzi, E.: Convex neighborhoods for Lipschitz connections and sprays. Monatsh Math. 177, 569–625 (2015)
Minguzzi, E.: The boundary of the chronology violating set. Class. Quantum Gravit. 33, 225004 (2016)
Minguzzi, E.: Lorentzian causality theory. Living reviews in relativity vol. 22:3, 1–202. Springer (2019)
Minguzzi, E.: A gravitational collapse singularity theorem consistent with black hole evaporation. Lett. Math. Phys. 110, 2383–2396 (2020)
Minguzzi, E., Sánchez, M.: The causal hierarchy of spacetimes, in Recent developments in pseudo-Riemannian geometry, H. Baum and D. Alekseevsky (eds.), ESI Lect. Math. Phys. (Eur. Math. Soc. Publ. House, Zurich), pp. 299–358 (2008)
Misner, C.W., Thorne, K.S., Wheeler, J.A.: Gravitation. W.H. Freeman and Co., New York (1973)
Newman, E.T., Penrose, R.: An approach to gravitational radiation by a method of spin coefficients J. Math. Phys.3 566–78; erratum4 998 (1962)
Newman, E.T., Penrose, R.: 10 exact gravitationally conserved quantities. Phys. Rev. Lett. 15, 231–33 (1965)
Newman, E.T., Penrose, R.: New conservation laws for zero rest-mass fields in asymptotically flat space-time. Proc. R. Soc. Lond. A 305, 175–204 (1968)
Newman, R.P.A.C.: Persistent curvature and cosmic censorship. Gen. Relativ. Gravit. 16, 1177 (1984)
Newman, R.P.A.C.: Topology and stability of marginal 2-surfaces. Class. Quantum Gravit. 4, 277 (1987)
O’Neill, B.: Semi-Riemannian Geometry: With Applications to Relativity. Academic Press, Cambridge (1983)
Oppenheimer, J.R., Snyder, H.: On continued gravitational contraction. Phys. Rev. 56, 455–459 (1939)
Oppenheimer, J.R., Volkoff, G.M.: On massive neutron cores. Phys. Rev. 55, 374 (1939)
Penrose, R.: A spinor approach to general relativity. Ann. Pays. (N.Y.) 10, 171–201 (1960)
Penrose, R.: Asymptotic properties of fields and space-times. Phys. Rev. Lett. 10, 66–68 (1963)
Penrose, R.: Conformal treatment of infinity, In: Relativity Groups and Topology eds. C M de Witt and B de Witt (New York: Gordon and Breach) pp. 566–84 (1964)
Penrose, R.: Gravitational collapse and space-time singularities. Phys. Rev. Lett. 14, 57 (1965)
Penrose, R.: A remarkable property of plane waves in General Relativity. Rev. Mod. Phys. 37, 215 (1965)
Penrose, R.: Zero rest-mass fields including gravitation: asymptotic behaviour. Proc. R. Soc. Lond. Ser. A 284, 159–203 (1965)
Penrose, R.: Structure of space-time. In: Batelle Rencontres, C. M. de Witt and J. A. Wheeler, eds. (Benjamin, New York) (1968)
Penrose, R.: Gravitational collapse: the role of general relativity. Riv. Nuovo Cimento 1, 252 (1969)
Penrose, R.: Techniques of Differential Topology in Relativity, Regional Conference Series in Applied Math. 7 (SIAM, Philadelphia) (1972)
Penrose, R.: Naked singularities. Ann. N. Y. Acad. Sci. 224, 125 (1973)
Penrose, R.: Singularities and time asymmetry, In: General Relativity: an Einstein Centenary Survey, S. W. Hawking and W. Israel, eds. (Cambridge University Press, Cambridge) (1979)
Penrose, R.: The question of cosmic censorship. J. Astrophys. Astron. 20, 233–248 (1999)
Penrose, R.: On the instability of extra space dimensions, in the future of the theoretical physics and cosmology, 185–201. Cambridge University Press, Cambridge (2003)
Penrose, R., Floyd, R.M.: Extraction of rotational energy from a black hole. Nat. Phys. Sci. 229, 177 (1971)
Penrose, R., Rindler, W.: Spinors and Spacetime, vol. 1. Cambridge University Press, Cambridge (1984)
Penrose, R., Rindler, W.: Spinors and Spacetime, vol. 2. Cambridge University Press, Cambridge (1986)
Poisson, E., Israel, W.: Inner-horizon instability and mass inflation in black holes. Phys. Rev. Lett. 63, 1663 (1989)
Raychaudhuri, A.K.: Relativistic cosmology I. Phys. Rev. 98, 1123 (1955)
Raychaudhuri, A.K.: Singular state in relativistic cosmology. Phys. Rev. 106, 172 (1957)
Reiterer, M., Trubowitz, E.: Strongly focused gravitational waves. Commun. Math. Phys. 307, 275 (2011)
Ringström, H.: Origin and development of the Cauchy problem in general relativity. Class. Quantum Gravit. 32, 124003 (2015)
Senovilla, J.M.M.: New class of inhomogeneous cosmological perfect-fluid solutions without big-bang singularity. Phys. Rev. Lett. 64, 2219 (1990)
Senovilla, J.M.M.: Singularity theorems and their consequences. Gen. Relativ. Gravit. 30, 701–48 (1998)
Senovilla, J.M.M.: Trapped surfaces, horizons and exact solutions in higher dimensions. Class. Quantum Gravit. 19, L113 (2002)
Senovilla, J.M.M.: On the existence of horizons in spacetimes with vanishing curvature invariants. J. High Energy Phys. 11, 046 (2003)
Senovilla, J.M.M.: Classification of spacelike surfaces in spacetime. Class. Quantum Gravit. 24, 3091–3124 (2007)
Senovilla, J.M.M.: A singularity theorem based on spatial averages. Pramana 69, 31–47 (2007)
Senovilla, J.M.M.: A new type of singularity theorem. In: Proceedings of 30th Spanish Relativity Meeting ERE2007, A. Oscoz, E. Mediavilla and M. Serra-Ricart eds., EAS Publ.Ser. 30 (2008). arXiv:0712.1428
Senovilla, J.M.M.: Trapped surfaces. Int. J. Mod. Phys. D 20, 2139–2168 (2011)
Senovilla, J.M.M.: Singularity theorems in general relativity: achievements and open questions, Chapter 15 of Einstein and the Changing Worldviews of Physics (eds. C Lehner, J Renn, M Schemmel), Einstein Studies 12, (Birkhäuser) (2012)
Senovilla, J.M.M.: A critical appraisal of the singularity theorems. Philos. Trans. R. Soc. A 380, 20210174 (2022). https://doi.org/10.1098/rsta.2021.0174
Senovilla, J.M.M., Garfinkle, D.: The 1965 Penrose singularity theorem. Class. Quantum Gravit. 32, 124008 (2015)
Simon, W.: Bounds on area and charge for marginally trapped surfaces with cosmological constant. Class. Quantum Gravit. 29, 062001 (2012)
Steinbauer, R.: The singularity theorems of General Relativity and their low regularity extensions. Jahresber. Dtsch. Math. Ver. (2022)
Stephani, H., Kramer, D., MacCallum, M.A.H., Hoenselaers, C., Herlt, E.: Exact Solutions to Einstein’s Field Equations, 2nd edn. Cambridge University Press, Cambridge (2003)
Szabados, L.B.: On singularity theorems and curvature growth. J. Math. Phys. 28, 142 (1987)
Thornburg, J.: Event and apparent horizon finders for 3+1 numerical relativity. Living Rev. Relativ. 10, 3 (2007)
Thorpe, J.A.: Curvature invariants and spacetime singularities. J. Math. Phys. 18, 960 (1977)
Tipler, F.J.: On the nature of singularities in general relativity. Phys. Rev. D 15, 942 (1977)
Tipler, F.J.: Singularities from colliding plane gravitational waves. Phys. Rev. D 22, 2929 (1980)
Tipler, F.J., Clarke, C.J.S., Ellis, G.F.R.: Singularities and Horizons—a review article. In: General Relativity and Gravitation: One Hundred Years After the Birth of Albert Einstein, A. Held, ed. (Plenum Press, New York) (1980)
Vilenkin, A., Wall, A.C.: Cosmological singularity theorems and black holes. Phys. Rev. D 89, 064035 (2014)
Wald, R.M.: General Relativity. The University of Chicago Press, Chicago (1984)
Wald, R.M.: Gravitational collapse and cosmic censorship, In: Black Holes, Gravitational Radiation and the Universe, edited by B.R. Iyer and B. Bhawal (Springer, Berlin) arXiv: gr-qc/9710068 (1998)
Wall, A.C.: The generalized second law implies a quantum singularity theorem. Class. Quantum Gravit. 30, 165003 (2013)
Witten, E.: Instability of the Kaluza–Klein vacuum. Nucl. Phys. B 195, 481 (1982)
Wyatt, Z.: The weak null condition and Kaluza–Klein spacetimes. J. Hyperbolic Differ. Equ. 15, 219–58 (2018)
Yurtsever, U.: Singularities in the collisions of almost-plane gravitational waves. Phys. Rev. D 38, 1731 (1988)
Acknowledgements
This article is freely based on my contribution The 1965 singularity theorem and its legacy to the conference “Singularity theorems, causality, and all that: A tribute to Roger Penrose” (SCRI21), June 14–18, 2021. I am grateful to the organizers for giving me the opportunity to deliver the opening talk.
Funding
Supported by the Basque Government grant number IT1628-22, and by Grants FIS2017-85076-P and PID2021-123226NB-I00 funded by the Spanish MCIN/AEI/10.13039/501100011033 together with “ERDF A way of making Europe”.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
This article belongs to a Topical Collection: Singularity theorems, causality, and all that (SCRI21).
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Senovilla, J.M.M. The influence of Penrose’s singularity theorem in general relativity. Gen Relativ Gravit 54, 151 (2022). https://doi.org/10.1007/s10714-022-03038-8
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s10714-022-03038-8