In this paper we prove several multiplicity results of t-periodic light rays in conformally stationary spacetimes using the Fermat metric and the extensions of the classical theorems of Gromoll-Meyer and Bangert-Hingston to Finsler manifolds. Moreover, we exhibit some stationary spacetimes with a finite number of t-periodic light rays and compute a lower bound for the period of the light rays w...

Raymond A. Harvey, MPH; Jeremy Rassen, ScD; Carly Kabelac, BS; Wendy Turenne, MS; Sandy Leonard, Reyna Klesh, William Meyer III, PhD, D(ABMM), MLS(ASCP)CM; Harvey W. Kaufman, MD, MBA; Steve Anderson, PhD; Oren Cohen, MD; Valentina I. Petkov, Kathy Cronin, Alison L. Van Dyke, Douglas R. Lowy, Norman E. Sharpless, Lynne T. Penberthy, MPH

B. Lemasson, S. Galbán, C. Tsien, C. R. Meyer, T. D. Johnson, T. L. Chenevert, A. Rehemtulla, B. D. Ross, and C. J. Galbán Radiology, University of Michigan, Ann Arbor, Michigan, United States, Radiation Oncology, University of Michigan, Center for Molecular Imaging, Ann Arbor, Michigan, United States, Biomedical, University of Michigan, Center for Molecular Imaging, Ann Arbor, Michigan, United...

Submitters: Emily H. Coch, Gerald Kessler, and John S. Meyer, Department of Pathology and Laboratory Medicine, The Jewish Hospital of St. Louis, St. Louis, Mo. 63110 Evaluators: Paul T. Russell, Department of Obstetrics and Gynecology, University of Cincinnati Medical Center, Cincinnati, Ohio 54229 Donald T. Forman, Division of Clinical Biochemistry, Evanston Hospital, Evanston, Ill. 60201 Lasz...

When n = 2, T is a Fourier multiplier, and it is well known that such operators are bounded on L, 1 < p < ∞, if m is a symbol of order 0. Coifman and Meyer [2]–[7], Kenig and Stein [14], and Grafakos and Torres [12] extended this result to the n > 2 case, showing that one had the mapping properties T : L1 × . . .× Ln−1 → Lpn (3) whenever 1 < pi ≤ ∞ (4) for i = 1, . . . , n− 1, 1/(n− 1) < pn <∞,...