We prove the following conjecture due to Bryant Mathews (2008). Let Q be the orthogonal grassmannian of totally isotropic i-planes of a non-degenerate quadratic form q over an arbitrary field (where i is an integer satisfying 1 ≤ i ≤ (dim q)/2). If the degree of each closed point on Q is divisible by 2 and the Witt index of q over the function field of Q is equal to i, then the variety Q is 2-i...

UniVersity of Illinois at Urbana-Champaign, 600 South Mathews AVenue, Urbana, Illinois 61801, United States of America; Department of Chemical and Biomolecular Engineering, National UniVersity of Singapore, 4 Engineering DriVe 4, Singapore 117576; Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore 627833; and Department of Chemical Engineering, Massachusetts ...

The aetiology of Tourette syndrome is highly complex and still poorly understood. In this issue, using data from a large, prospective, population-based cohort of children, Mathews et al examine associations of pre- and perinatal exposures with Tourette syndrome and other chronic tic disorders. Their work illustrates the importance of environmental factors in the aetiology of neuropsychiatric co...

M. Alcubierre, S. Brandt, B. Brügmann, C. Gundlach, J. Massó, E. Seidel, P. Walker Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Schlaatzweg 1, 14473 Potsdam, Germany (2) National Center for Supercomputing Applications, Beckman Institute, 405 N. Mathews Ave., Urbana, IL 61801 (3) Departments of Astronomy and Physics, University of Illinois, Urbana, IL 61801 (4) Departame...

Richard E. Latchaw, MD, Chair; Mark J. Alberts, MD, FAHA; Michael H. Lev, MD, FAHA; John J. Connors, MD; Robert E. Harbaugh, MD, FAHA; Randall T. Higashida, MD, FAHA; Robert Hobson, MD, FAHA†; Chelsea S. Kidwell, MD, FAHA; Walter J. Koroshetz, MD; Vincent Mathews, MD; Pablo Villablanca, MD; Steven Warach, MD, PhD; Beverly Walters, MD; on behalf of the American Heart Association Council on Cardi...

Mathews Journal of Case Reports Endoscopic Hemoclipping of Upper Gastrointestinal Bleeding Secondary to Intramural Gastric Hematoma Following Endoscopic Mucosal Resection. Two Case Reports and Review of the Literature Lei Shi1, Fu-Jian Liu1 1Department of Gastroenterology, Eighth Affiliated Hospital of Guangxi Medical University, Guigang 537100, Guangxi Zhuang Autonomous Region, China. Correspo...

but nearly a half a century passed before Hadamard and de la Vallée Poussin independently succeeded in proving that 7r (x) / {x/log x} -* I as x -> oc. This is the famous prime number theorem (P.N.T .) . Interesting accounts of the foregoing may be found in the books of Ingham [2], Landau [3], and Mathews [4] . Here we consider the following hypothetical question . Could Chebyshev in principle ...

John Baker, Steven Brandt, Manuela Campanelli, Carlos O. Lousto, Edward Seidel and Ryoji Takahashi Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, Am Mühlenberg 5, D-14476 Golm, Germany National Center for Supercomputing Applications, Beckman Institute, 405 N. Mathews Ave., Urbana, IL 61801 Departments of Astronomy and Physics, University of Illinois, Urbana, IL 61801 Depa...