extended equations for their properties. That ad hoc introduction of fractional operators may be appealing to casual readers, but the bookâs axiomatic format makes it less suitable as a text for a graduate course. Overall, Fractional Calculus is an affordable and valuable introduction to the field that will appeal to physicists interested in scientific what-ifs. Ralf Metzler University of Potsdam Potsdam-Golm, Germany International Workshop on Double and Multiple Stars: Dynamics, Physics, and Instrumentation. J. A. Docobo, V. S. Tamazian, Y. Y. Balega, eds. AIP Conference Proceedings 1346. Proc. wksp., Santiago de Compostela, Spain, Dec. 2009. AIP, Melville, NY, 2011. $135.00 (155 pp.). ISBN 978-0-73540902-6, CD-ROM Principles of Star Formation. P. H. Bodenheimer. Astronomy and Astrophysics Library. Springer, Berlin, 2011. $124.00 (343 pp.). ISBN 978-3-642-15062-3 The Pulsations of the Sun and the Stars. J.-P. Rozelot, C. Neiner, eds. Lecture Notes in Physics 832. Springer, Berlin, 2011. $89.00 paper (344 pp.). ISBN 978-3-64219927-1 The Transient Radio Sky. E. F. Keane. Springer Theses. Springer, Berlin, 2011. $129.00 (190 pp.). ISBN 978-3-642-19626-3 new books acoustics Acoustical Design of Theatres for Drama Performance 1985â2010. D. T. Bradley, E. E. Ryherd, M. C. Vigeant. Acoustical Society of America, Melville, NY, 2010. $60.00 (329 pp.).
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