## John Friedman

**Distinguished Professor Emeritus**

**: (414) 229-4476**

Phone

Phone

**Office**: 422

**Features**:

Distinguished Professor Emeritus

Related links:

- "Space, Time, Einstein and Spacetime" (Science Bag Video)

# John Friedman

## Research:

John Friedman has worked on a variety of problems in gravitational physics, involving neutron stars, black holes and gravitational collapse, the topology of spacetime, and topological questions in quantum gravity.

## Biographical Sketch:

John Friedman received his B.A from Harvard College in 1967 and his Ph.D from the University of Chicago in 1973, supervised by Nobel laureate S. Chandrasekhar. From 1974 to 1976 he was a Fermi Fellow at the University of Chicago. Since 1976 he has been at the University of Wisconsin-Milwaukee, where Friedman served for three years as Chair of the Department of Physics and where he currently holds the rank of University Distinguished Professor Emeritus.

Friedman is a Fellow of the American Physical Society and a former chair of its gravitational physics section. He has served on the editorial boards of several prestigious journals, including Classical and Quantum Gravity, Physical Review Letters and Physical Review D. Professor Friedman is currently a U.S. representative to the International Society of General Relativity and Gravitation.

## Selected publications:

**Recent Articles**

- C.Markakis, R.H.Price, and J.L.Friedman

"Iteration stability for simple Newtonian stellar systems"

*J.Math.Phys*50, 073505 (2009). (arXiv:0903.3074)

- J. S. Read, C. Markakis, M. Shibata, K. Uryu, J. D. E. Creighton, and J. L. Friedman

"Measuring the neutron star equation of state with gravitational wave observations''

*Phys. Rev. D*79, 124033 (2009). (arXiv:0901.3258)

- J. S. Read, B. D. Lackey, B. J. Owen, and J. L. Friedman

"Constraints on a phenomenologically parametrized neutron-star equation of state''

*Phys. Rev. D*79, 124032 (2009). (arXiv:0812.2163) - T. S. Keidl, A. G. Wiseman, and J. L. Friedman

"On finding fields and self-force in a gauge appropriate to separable wave equations''

*Phys. Rev. D*bf 75, 124009 (2007). (gr-qc/0611072)

- S. Yoshida, B. Bromley, J.S. Read, K. Uryu, and J.L. Friedman,

"Models of helically symmetric binary systems"

*Classical and Quantum Gravity*23 (2006) S599-S614.

(Expanded version is on the web at gr-qc/0605035)

**Books and Book Chapters
**

- John L. Friedman and Nikolaos Stergioulas

"Rotating Relativistic Stars"

*Cambridge University Press*, 2013, 438 pages; ISBN 978-0-521-87254-6

**Some Earlier Work
**

- Scott Koranda, Nikolaos Stergioulas, John L. Friedman

"Upper Limit Set by Causality on the Rotation and Mass of Uniformly Rotating Relativistic Stars"

Astrophysical Journal, 488 (1997) 799. (arXiv:astro-ph/9608179v1) - J. L. Friedman and A. Higuchi

"Topological Censorship and Chronology Protection''

Annalen der Physik, 15, 109-128 (2006) - John L. Friedman, Kristin Schleich, Donald M. Witt

"Topological Censorship''

Phys.Rev.Lett. 71 (1993) 1486-1489; Erratum-ibid. 75 (1995) 1872. (arXiv:gr-qc/9305017v2) - J. L. Friedman, M. S. Morris, I. D. Novikov, F. Echeverria, G. Klinkhammer, Kip S. Thorne, and U. Yurtsever

"Cauchy problem in spacetimes with closed timelike curves"

Phys. Rev. D 42, 1915 - 1930 (1990) - John L. Friedman and Donald M. Witt

"Homotopy is not isotopy for homeomorphisms of 3-manifolds"

Topology, 25, (1986), 35-44 - John L. Friedman and Rafael D. Sorkin

"Spin ½ from Gravity"

Phys. Rev. Lett. 44, 1100 - 1103 (1980) - John L. Friedman and Bernard F. Schutz, Jr.

"Secular instability of rotating Newtonian stars''

Ap. J. 222, 281 (1978) - John L. Friedman

"Generic instability of rotating relativistic stars''

Comm.Math. Phys. 62, 247 (1978)