
\magnification=\magstep1
\raggedbottom
\centerline{\bf  PUBLICATIONS and PREPRINTS}
\bigskip
\centerline{\it Rafael D. Sorkin}
\bigskip
\baselineskip=12pt

\item{1.} {\it Development of Simplicial Methods for the Metrical and
           Electromagnetic Fields},
           Ph.D. Thesis, California Institute of Technology (1974)
           (available from University Microfilms, Ann Arbor, Michigan)
\medskip
\item{2.} ``The Time-evolution Problem in Regge Calculus'',
          {\it Phys. Rev.} {\bf D12}, 385-396 (1974); and {\bf D23}, 565 (1981)
             % (Caltech preprint OAP 374)
\medskip
\item{3.} ``The Electromagnetic Field on a Simplicial Net'',
    {\it J. Math. Phys.} {\bf 16}, 2432-2440 (1975); and {\bf 19}, 1800  (1978)
            % (Caltech preprint OAP 393)
\medskip
\item{4.} ``Variational Aspects of Relativistic Field Theories,
            with Application to Perfect Fluids'',
           {\it Annals of Phys.} (New York) {\bf 107}, 1-43 (1977)
           % (University College, Cardiff preprint No.23
            % in the ``Astrophysics and Relativity'' series)
            (with B. F. Schutz)
\medskip
\item{5.} ``On Stress-Energy Tensors'',
           {\it Gen. Rel. Grav.} {\bf 8}, 437-449 (1977)
           % (University College, Cardiff preprint No.22
           % in the ``Astrophysics and Relativity'' series)
\medskip
\item{6.} ``A New Criterion for Secular Instability of Rapidly Rotating
           Stars'',
           {\it Ap. J.} {\bf 217}, L49-L53 (1977)
           % (University College, Cardiff preprint No.34
            % in the ``Astrophysics and Relativity'' series)
            (with J.M. Bardeen, J.L. Friedman, and B.F. Schutz)
\medskip
\item{7.} ``On the Relation Between Charge and Topology'',
           {\it J. Phys.} {\bf A10}, 717-725 (1977); and {\bf A11}, 795 (1978)
           % (University College, Cardiff preprint No.26
           % in the ``Astrophysics and Relativity'' series)
\medskip
\item{8.} ``The Triviality of Continuous Multipliers for the Real Line'',
  {\it Int. J. Theor. Phys.} {\bf 17}, 369-376 (1978); and {\bf 18}, 777 (1979)
           % (University College, Cardiff preprint No.24
           % in the ``Astrophysics and Relativity'' series)
\medskip
\vbox{
\item{9.} ``On the Failure of the Time-Energy Uncertainty Principle'',
           {\it Found. Phys.} {\bf 9}, 123-128 (1979)
           % (University College, Cardiff preprint No.33
           % in the ``Astrophysics and Relativity'' series)
}
\medskip
\item{10.} ``The Quantum Electromagnetic Field in Multiply-Connected Space'',
           {\it J. Phys.} {\bf A12}, 403-421 (1979)
           % (University College, Cardiff preprint No.46
           %  in the ``Astrophysics and Relativity'' series)
\medskip
\item{11.} ``On the Meaning of the Canonical Ensemble'',
           {\it Int. J. Theor. Phys.} {\bf 18}, 309-321 (1979)
           % (University College, Cardiff preprint No.49
           %  in the ``Astrophysics and Relativity'' series)
\medskip
\item{12.} ``Dyon Spin and Statistics: A Fiber-Bundle Theory of
            Interacting Magnetic and Electric Char\-ges'',
           {\it Phys. Rev.} {\bf D20}, 2511-2525 (1979)
            (with J.L. Friedman)
\medskip
\item{13.} ``The Unitary Multiplicity-free Representations
                of $\overline{SL(4,R)}$'',
           {\it J. Math. Phys.} {\bf 21}, 1269-1276 (1980)
            (with J.L. Friedman)
\medskip
\item{14.} ``A Spin-Statistics Theorem for Composites Containing both
            Electric and Magnetic Charges'',
           {\it Comm. Math. Phys.} {\bf 73}, 161-196 (1980)
            (with J.L. Friedman)
\medskip
\item{15.} ``Spin-$1/2$ from Gravity'',
    {\it Phys. Rev. Lett.} {\bf 44}, 1100-1103 (1980); and {\bf 45}, 148 (1980)
            (with J.L. Friedman)
\medskip
\item{16.} ``An Information-Theoretic Approach to `Curve Fitting' '',
            Institute for Advanced Study preprint (1981)
\medskip
\item{17.} ``A Boundary Term for the Action in `Regge Calculus' '',
           {\it Gen. Rel. Grav.} {\bf 13}, 541-549 (1981)
            (with J.B. Hartle)
\medskip
\item{18.} ``Entropy of Self-Gravitating Radiation'',
           {\it Gen. Rel. Grav.} {\bf 13}, 1127-1146 (1981)
            (with R.M. Wald and Zhang Zh.-J.)
\medskip
\item{19.} ``A Criterion for the Onset of Instability at a Turning Point'',
           {\it Ap. J.} {\bf 249}, 254-257 (1981)
\medskip
\vbox{
\item{20.} ``Half-Integral Spin from Quantum Gravity'',
           {\it Gen. Rel. Grav.} {\bf 14}, 615-620 (1982)
 	           (with J.L. Friedman)
}
\medskip
\item{21.} ``A Stability-Criterion for Many-Parameter Equilibrium Families'',
           {\it Ap. J.} {\bf 257}, 847-854 (1982)
\medskip
\vbox{
\item{22.} ``Posets as Lattice Topologies'',
            in B. Bertotti, F. de Felice, A. Pascolini (eds.),
            {\it General Relativity and Gravitation}, vol. I, 635-637
            (Roma, Consiglio Nazionale Delle Ricerche, 1983)
}
\medskip
\item{23.} ``Kinematics of Yang-Mills Solitons'',
           {\it Comm. Math. Phys.} {\bf 89}, 483-499 (1983)
            (with J.L. Friedman)
\medskip
\item{24.} ``Statistics of Yang-Mills Solitons'',
           {\it Comm. Math. Phys.} {\bf 89}, 501-521 (1983)
            (with J.L. Friedman)
\medskip
\item{25.} ``Particle Statistics in Three Dimensions'',
           {\it Phys. Rev.} {\bf D27}, 1787-1797 (1983)
\medskip
\item{26.} ``A Quantitative Occam's Razor'',
           {\it Int. J. Theor. Phys.} {\bf 22}, 1091-1104 (1983)
\medskip
\item{27.} ``Quantum States (Still) Cannot be Local'',
            University of Maryland preprint (1983)
\medskip
\item{28.} ``Remarks on Diffeomorphisms as Particle Symmetries'',
            in B. Bertotti, F. de Felice, A. Pascolini (eds.),
            {\it General Relativity and Gravitation}, vol. II, 1167-1169
            (Roma, Consiglio Nazionale Delle Ricerche, 1983)
\medskip
\item{29.} ``A Kaluza-Klein Monopole'',
        {\it Phys. Rev. Lett.} {\bf 51}, 87-90 (1983); and {\bf 54}, 86 (1985).
            Reprinted in: T. Appelquist, A. Chodos,  and P.G.O. Freund (eds.),
            {\it Modern Kaluza-Klein Theories} (Benjamin, 1986)
\medskip
\item{30.} ``A New Use for the Taub-NUT Metric'',
            in B. Bertotti, F. de Felice, A. Pascolini (eds.),
            {\it General Relativity and Gravitation}, vol. I, 357-359
            (Roma, Consiglio Nazionale Delle Ricerche, 1983)
\medskip
\vbox{
\item{31.} ``Diffusion, Differential Geometry, and Black Holes'',
            in B. Bertotti, F. de Felice, A. Pascolini (eds.),
            {\it General Relativity and Gravitation}, vol. II, 737-739
            (Roma, Consiglio Nazionale Delle Ricerche, 1983)
}
\medskip
\vbox{
\item{32.} ``On the Entropy of the Vacuum Outside a Horizon'',
            in B. Bertotti, F. de Felice, A. Pascolini (eds.),
            {\it General Relativity and Gravitation}, vol. II, 734-736
            (Roma, Consiglio Nazionale Delle Ricerche, 1983)
}
\medskip
\item{33.} ``A 5-Dimensional Monopole'',
            in J.L. Stone (editor), {\it Monopole '83} (Plenum, 1984)
            (proceedings of the Ann Arbor conference of the same name)
\medskip
\item{34.} ``Quantum Gravity,'' - Review of {\it Quantum Theory of Gravity}:
            Essays in Honor of the $60^{th}$ Birthday of Bryce S. Dewitt;
            Steven M. Christensen, (Editor) (Hilgar, Bristol, 1984) -
           {\it Science} {\bf 228}, 572 (1985)
\medskip
\item{35.} ``Stochastic Evolution on a Manifold of States'',
           {\it Ann. Phys.} (New York) {\bf 168}, 119-147 (1986)
\medskip
\item{36.} ``Introduction to Topological Geons'',
            in P.G. Bergmann and V. de Sabbata (eds.),
            {\it Topological Properties and Global Structure
            of Space-Time}, pp. 249-270 (Plenum, 1986)
\medskip
\item{37.} ``On Topology Change and Monopole Creation'',
           {\it Phys. Rev.} {\bf D33}, 978-982 (1986)
\medskip
\item{38.} ``Non-Time-Orientable Lorentzian Cobordism Allows for Pair
            Creation'',\hfil\break
           {\it Int. J. Theor. Phys.} {\bf 25}, 877-881 (1986)
\medskip
\item{39.} ``Toward an Explanation of Entropy Increase in the Presence of
            Quantum Black Holes'',
           {\it Phys. Rev. Lett.} {\bf 56}, 1885-1888 (1986)
\medskip
\item{40.} ``A Quantum Source of Entropy for Black Holes'',
           {\it Phys. Rev.} {\bf D34}, 373-383 (1986)
            (with L. Bombelli, R.K. Koul, J. Lee)
           Reprinted in: B.-K. Hu and L. Parker (eds.)
           {\it Quantum Theory in Curved Spacetime} (World Scientific,
           in press)
\medskip
\item{41.} ``A Simplified Derivation of Stimulated Emission by Black Holes'',
           {\it Classical and Quantum Gravity} {\bf 4}, L149-L155 (1987)
\medskip
\item{42.} ``Quantum Symmetries from Quantum Phases,
        Fermions from Bosons, a {\bf Z}$_2$ Anomaly, and Galilean Invariance'',
           {\it Nuc. Phys.} {\bf B281}, 573-612 (1987)
            (with A.P. Balachandran and H. Gomm)
\medskip
\vbox{
\item{43.} ``On Energy in Five-dimensional Gravity'',
           {\it Nuc. Phys.} {\bf B289}, 735-756 (1987)
            (with L. Bombelli, R.K. Koul, G. Kunstatter, J. Lee)
}
\vbox{
\medskip
\item{44.} ``Topological Aspects of String Theories'',
           {\it Nuc. Phys.} {\bf B287}, 508-550 (1987)
            (with A.P. Balachandran, F. Lizzi, J. Sparano)
}
\medskip
\vbox{
\item{45.} ``Spacetime as a Causal Set'',
           {\it Phys. Rev. Lett.} {\bf 59}, 521-524 (1987)
            (with L. Bombelli, J. Lee, D. Meyer)
}
\medskip
\item{46.} ``A General Relation between Kink Exchange and Kink Rotation'',
           {\it Comm. Math. Phys.} {\bf 115}, 421-434 (1988)
\medskip
\item{47.} ``Conserved Quantities as Action Variations'',
  in James W. Isenberg, (ed.), {\it Mathematics and General Relativity}, 23-37
            (Volume 71 in the AMS's Contemporary Mathematics series)
        (Proceedings of a conference, held June 1986 in Santa Cruz, California)
            (Providence, American Mathematical Society, 1988)
\medskip
\item{48.} ``Bombelli et al. Reply'',
           {\it Phys. Rev. Lett.} {\bf 60}, 656 (1988)
            (with L. Bombelli, J. Lee, D. Meyer)
\medskip
\item{49.} ``Turning Point Method for Axisymmetric Stability of
            Rotating Relativistic Stars'',
           {\it Ap. J.} {\bf 325}, 722 (1988)
            (with J.L. Friedman and J.R. Ipser)
\medskip
\item{50.} ``A Derivation of a Bogomol'ny Inequality in Five-dimensional
            Kaluza-Klein Theory'',
           {\it Comm. Math. Phys.} {\bf 116}, 353-364 (1988)
            (with J. Lee)
\medskip
\item{51.} {\it Physics for Science and Engineering Students},
            (Kendall Hunt, 1988)
            (with P. Dowben and E. Schiff)
\medskip
\item{52.} ``Statistics and General Relativity'',
           {\it Modern Physics Letters} {\bf A4}, 331-338 (1989)
            (with Ch. Aneziris, A.P. Balachandran, M. Bourdeau, S. Jo,
            and T.R. Ramadas)
\medskip
\item{53.} ``Quantum Stabilization of the Skyrme Soliton'',
           {\it Phys. Rev.} {\bf D39}, 998-1001 (1989)
            (with P. Jain and J. Schechter)
\medskip
\vbox{
\item{54.} ``Classical Topology and Quantum Phases: Quantum Geons'',
            in S. De Filippo, M. Marinaro, G. Marmo (eds.),
            {\it Geometrical and Algebraic Aspects of Nonlinear Field Theories}
            (Proceedings of the conference of the same name, held Amalfi,
            Italy, May, 1988), 201-218, (Elsevier, Amsterdam, 1989)
}
\medskip
\vbox{
\item{55.} ``Topological Objects in Quantum Gravity'',
            in Proceedings of the MRST Conference: Progress in Theoretical
            Physics, Toronto, 1988, 94-102 (World Scientific, 1988)
            (with Ch. Aneziris, A.P. Balachandran, M. Bourdeau, S. Jo,
            and T.R. Ramadas)
}
\medskip
\item{56.} ``Aspects of Spin and Statistics in Generally Covariant Theories'',
            {\it Int. J. Mod. Phys.} {\bf A4}, 5459-5510 (1989)
            (with Ch. Aneziris, A.P. Balachandran, M. Bourdeau, S. Jo,
            and T.R. Ramadas)
\medskip
\item{57.} ``Consequences of Spacetime Topology'',
            in A. Coley, F. Cooperstock and B. Tupper (eds.), {\it Proceedings
            of the Third Canadian Conference on General Relativity and
            Relativistic Astrophysics} held Victoria, Canada, May 1989,
            pp. 137-163 (World Scientific, Singapore, 1990)
\medskip
\item{58.} ``Does a Discrete Order underly Spacetime and its Metric?'',
            in A. Coley, F. Cooperstock and B. Tupper (eds.), {\it Proceedings
            of the Third Canadian Conference on General Relativity and
            Relativistic Astrophysics} held Victoria, Canada, May 1989,
            pp. 82-86 (World Scientific, Singapore, 1990)
\medskip
\item{59.} ``Interpretation of the ``quantum-stabilized skyrmion'' '',
            {\it Phys. Rev.} {\bf D41}, 3855-3856 (1990)
            (with P. Jain and J. Schechter)
\medskip
\item{60.} ``A Topological Spin-Statistics Theorem or A Use of the
            Antiparticle'',
            {\it Modern Physics Letters} {\bf A5}, 1575-1586 (1990)
             (with A.P. Balachandran, A. Daughton, Gu Zhichong, G. Marmo,
            A.M. Srivastava);
            Also published in: {\it Physica Scripta} {\bf T36}, 253-257 (1991)
\medskip
\item{61.} ``Problems with Causality in the Sum-over-histories Framework
            for Quantum Mechanics'',
            in A. Ashtekar and J. Stachel (eds.), {\it Conceptual Problems of
            Quantum Gravity,}
            (Proceedings of the conference of the same name, held Osgood Hill,
             Mass., May 1988), pp. 217-227 (Birkh\"auser, Boston, 1991)
\medskip
\vbox{
\item{62.} ``A Finitary Substitute for Continuous Topology?'',
            %(Institute for Advanced Study preprint IASSNS-HEP-87/39)
           {\it Int. J. Th. Phys.} {\bf 30}, 923-947 (1991)
}
\medskip
\vbox{
\item{63.} ``A Sum Over Histories Account of an EPR(B) Experiment''
            (with Sukanya Sinha)
            %(University of Maryland Preprint)
            {\it Found. of Phys. Lett.} {\bf 4}, 303-335 (1991)
}
\medskip
\vbox{
\item{64.} ``First Steps with Causal Sets''
            in R. Cianci, R. de Ritis, M. Francaviglia, G. Marmo, C. Rubano,
            P. Scudellaro (eds.), {\it General Relativity and Gravitational
            Physics,} (Proceedings of the Ninth Italian Conference of the same
            name, held Capri, Italy, September, 1990), 68-90
            (World Scientific, Singapore) (1991)
}
\medskip
\item{65.} ``Spacetime and Causal Sets''
            in J.C. D'Olivo, E. Nahmad-Achar, M. Rosenbaum, M.P. Ryan, L.F.
            Urrutia and F. Zertuche (eds.), {\it Relativity and Gravitation:
            Classical and Quantum,} (Proceedings of the {\it SILARG VII
            Conference}, held Cocoyoc, Mexico, December, 1990), 150-173
            (World Scientific, Singapore, 1991)
\medskip
\item{66.} ``The Gravitational-Electromagnetic Noether-Operator
            and the Second-Order Energy Flux'',
            {\it Proceedings of the Royal Society, London} {\bf A435},
           635-644 (1991)
\medskip
\item{67.} ``Brownian Motion at Absolute Zero'',
            (with Supurna Sinha)
            {\it Phys. Rev.} {\bf B45}, 8123-8126 (1992)
\medskip
\item{68.} ``New Demonstration of the Positivity of Mass'',
            (with E. Woolgar)
            in G. Kunstatter, D. E. Vincent, J. G. Williams (eds.)
            {\it Proceedings of the Fourth Canadian Conference on
            General Relativity and Relativistic Astrophysics} held
            Winnipeg, Canada, May, 1991, 206-210 (World Scientific,
            Singapore, 1992)
\medskip
\item{69.} ``When Can Identical Particles Collide?'',
            (with Michele Bourdeau)
            {\it Phys. Rev.} {\bf D45}, 687-696 (1992)
\medskip
\item{70.}   ``The Spin-Statistics Connection from  Homology Groups of
               Configuration Space, and an Anyon Wess-Zumino Term''
          (with A.P. Bala\-chan\-dran, W. McGlinn, L.\'O Rai\-feartaigh and S. Sen)
            {\it Int. J. of Mod. Phys.} {\bf A7}, 6887 (1992);
                          and {\bf A9}, 1395 (1994)
\medskip
\item{71.} ``Topological Spin-Statistics Theorems for Strings''
            (with A.P. Balachandran, W. Mc\-Glinn, L.'O Raifear\-taigh, S. Sen
            and A Srivastava)
            {\it Modern Physics Letters} {\bf A7}, 1427 (1992)
\medskip
\item{72.} ``Causal Structure and the Positivity of Mass'',
            (with E. Woolgar)
            in {\it Proceedings of the sixth Marcel Grossman Conference}
            held Kyoto, Japan, June, 1991, 754 (World Scientific,
            Singapore, 1992)
\medskip
\vbox{
\item{73.} ``Summary of Workshop A3: Mathematical Studies of Einstein's
            and Other Relativistic Equations/Alter\-native Gravity Theories'',
            in R. J. Gleiser, C. N. Kozameh, O. M. Moreschi (eds.) {\it
            ``General Relativity and Gravitation 1992 '': Proceedings
            of the  Thirteenth Conference on General Relativity
            and Gravitation} held in Huerta Grande, Cordoba, June-July, 1992,
            353-358 (Institute of Physics, Bristol, 1993)
}
\medskip
\item{74.} ``Impossible Measurements on Quantum Fields'',
            in Bei-Lok Hu and T. A. Jacobson (eds.) {\it ``Directions in
            General Relativity''}: Proceedings of the 1993
            International Symposium, Vol. II, Papers in
            honor of Dieter Brill's Sixtieth Birthday, 293-305 (Cambridge
            University Press, Cambridge, 1993)
            (available from the gr-qc bulletin board as Paper: gr-qc/9302018)
\medskip
\item{75.} ``A Spin-Statistics Theorem with no Relativity or Field
            Theory'',
            (with A.P. Balachandran, A. Daughton, Gu Zhichong, G. Marmo,
            A.M. Srivastava),
            {\it Int. J. Mod. Phys.} {\bf A8}, 2993-3044 (1993)
\medskip
\item{76.} ``On the Role of Time in the Sum-over-histories Framework for
            Gravity'',  paper given at the conference entitled
            ``History of Modern Gauge Theories'', held at Logan, Utah,
            July, 1987, {\it Int. J. Th. Phys} {\bf 33}, 523-534 (1994)
\medskip
\vbox{
\item{77.} ``A Specimen of Theory Construction from Quantum Gravity'',
            in  J. Leplin (ed.), {\it The Creation of Ideas in Science}
            (Paper presented at the Thirteenth Annual Symposium in Philosophy,
            How Theories are Constructed:
            The Methodology of Scientific Creativity,
            held Greensboro, North Carolina, March, 1989)
            (Kluwer Academic Publishers, Dordrecht, in press)
}
\medskip
\item{78.} ``Initial Conditions and Unitarity in Unimodular Quantum
           Cosmology'',
           (with A. Daughton and J. Louko)
           {\it Proceedings of the Fifth Canadian Conference on
           General Relativity and Relativistic Astrophysics} held
           Waterloo, Canada, May, 1993, (World Scientific, to appear)
           (available from the gr-qc bulletin board as Paper: gr-qc/9305016)
\medskip
\item{79.} ``A Positive Mass Theorem based on the Focussing and
            Retardation of Null Geodesics'',
            (with R. Penrose and E. Woolgar)
            (submitted)
            (available from the gr-qc bulletin board as Paper: gr-qc/9301015)
\medskip
\item{80.} ``Quantum Mechanics as Quantum Measure Theory'',
           {\it Modern Physics Letters} {\bf A9}, 3119 (1994)
\medskip
\item{81.} ``A Parallelizable Implicit Evolution Scheme for Regge Calculus'',
            (with J. W. Barrett, M. P. Galassi, W. A. Miller,
            P. A. Tuckey and R. M. Williams)
            (submitted)
            (available from the gr-qc bulletin board as Paper: gr-qc/9411008)
\medskip
\item{82.} ``Forks in the Road, on the Way to Quantum Gravity'',
             talk given at the conference entitled ``Directions in
           General Relativity'', held at College Park, Maryland, May, 1993
           (SU-GP-93-12-2), (to appear)
\medskip
\item{83.} ``Energy Extremality in the Presence of a Black Hole'',
           S. Fulling (ed.), {\it Proceedings of the Conference on Heat
           Kernels and Quantum Gravity held Winnipeg, Canada, August, 1994}
           (U. of Texas) (to appear)
\medskip
\item{84.} ``Quantum Measure Theory and its Interpretation'', D. H. Feng
           (ed.), {\it Proceedings of the Conference on Quantum
           Nonintegrability: Quantum Classical Correspondence, held
           Philadelphia, September, 1994} (World Scientific) (to appear)
\medskip
\item{85.} ``Energy Extremality in the Presence of a Black Hole'',
           (with M. Varadarajan)
            (in preparation)
\medskip
\item{86.} ``Morse Theory and the Topology of Configuration Space'',
         (with  W. D. Mc\-Glinn, L. 'O Raifeartaigh, S. Sen)
           (in preparation)
\medskip
\item{87.} ``When are Two Lorentzian Metrics close?'',
            (with L. Bombelli)
            (in preparation)
\medskip
\item{88.} ``A Spin-Statistics Theorem for Certain Topological Geons'',
           (with H. F. Dowker)
           (in preparation)
\medskip
\item{89.} ``Conditions for the Application of Quantum Probabilities'',
          (in preparation)
\medskip
\item{90.} ``Initial Conditions and Unitarity in Quantum Cosmology with
           fixed 4-Volume'',
           (with A. Daughton and J. Louko)
          (in preparation)
\medskip
\item{91.} ``A Causal Order for $C^0$ Lorentzian Metrics: Proof of
           Compactness of the Space of Causal Curves'',
           (with E. Woolgar)
           (in preparation)
\medskip
\item{92.} ``On Poset Completion'',
            (with D.J. Meyer)
            (in preparation)
\medskip
\item{93.} ``Lisp Functions for Posets'',
           (in preparation)
\medskip
\item{94.} ``Computer Investigations of a Scalar Field on Causal Sets'',
           (with A. Daughtin)
           (in preparation)
\medskip
\item{95.} ``Topology Change and Field Fluctuations in Two Dimensions'',
            (with A. Daughton, Gu Zhichong, D. J. \'O Connor)
            (in preparation)
\medskip
\item{96.} ``Simplicial Minispace IV: Product Solutions on Product
            Manifolds'',
            (with J. B. Hartle and R. M. Williams)
            (in preparation)
\medskip
\item{97.} ``Causal Cobordisms: Topology Change without Causal Anomalies'',
            (with A. Borde)
            (in preparation)
\medskip
\item{98.} ``Curvature of Lorentzian Conical Singularities''
            (with J. Louko)
            (in preparation)
\medskip
\item{99.} ``Irreducible Representations of the Diffeomorphism Group''
            (with S. Surya)
            (in preparation)

\end

