Results 31 to 40 of about 4,114,452 (292)

Regge Calculus as a Fourth Order Method in Numerical Relativity [PDF]

, 1995
The convergence properties of numerical Regge calculus as an approximation to continuum vacuum General Relativity is studied, both analytically and numerically.
Barrett J W, Barrett J W, Brewin L, Brewin L, Cheeger J, Galassi M, Hartle J B, Mark A Miller, Miller M A, Miller W A, Misner C W, Press W H, Regge T, Sorkin R D, Tuckey P A, Williams R M   +15 more
core   +3 more sources

THE FOURTH ORDER MIXED PERIODIC RECURRENCE FRACTIONS

Journal of Vasyl Stefanyk Precarpathian National University, 2015
Offered economical algorithm for calculation of rational shortenings of thefourth-order mixed periodic recurrence fraction.
A.V. Semenchuk, R.A. Zatorsky
doaj   +1 more source

Compactness of solutions to some geometric fourth-order equations [PDF]

, 2005
We prove compactness of solutions to some fourth order equations with exponential nonlinearities on four manifolds. The proof is based on a refined bubbling analysis, for which the main estimates are given in integral form.
Malchiodi, Andrea
core   +3 more sources

A two - grid, fourth order method for nonlinear fourth order boundary value problems [PDF]

, 1985
A fourth order convergent finite difference method is developed for the numerical solution of the nonlinear fourth order boundary value problem y(iv)(x) = f(x,y ...
Twizell, E H
core  

Survival for Children Diagnosed With Wilms Tumour (2012–2022) Registered in the UK and Ireland Improving Population Outcomes for Renal Tumours of Childhood (IMPORT) Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background The Improving Population Outcomes for Renal Tumours of childhood (IMPORT) is a prospective clinical observational study capturing detailed demographic and outcome data on children and young people diagnosed with renal tumours in the United Kingdom and the Republic of Ireland.
Naomi Ssenyonga, Angela Lopez‐Cortes, Reem Al‐Saadi, Suzanne Tugnait, Kristina Dzhuma, Catriona Duncan, Gordan Vujanic, Tanzina Chowdhury, Claudia Allemani, Michel P. Coleman, Kathy Pritchard‐Jones, the Children's Cancer and Leukaemia Group (CCLG) Renal Tumour Special Interest Group, Hugh Bishop, Anthony McCarthy, Pamela Kearns, Helen Rees, Amos Burke, Meriel Jenney, Jane Pears, Hamish Wallace, Milind Ronghe, Tanzina Chowdhury, Susan Picton, Emma Ross, Lisa Howell, Bernadette Brennan, Gail Halliday, Richard Grundy, Shaun Wilson, Sucheta Vaidya, Daniel Yeomanson, Jessica Bate, Vesna Pavasovic, Jessica Bate, Sabine Irtan, Jesper Brok, Minou Oostveen, Kristina Dzhuma, Mark Weeks, Richard Williams, Mark Powis, Max Pachl, Bruce Okoye, Naima Smeulders, Gordan Vujanic, Oystein Olsen, Tom Watson, Susan Shelmerdine, Dan Saunders, Angela Lopez-Cortes, Taryn Treger, Tom Jackson, Suzanne Tugnait, Lisa Howell, Tanzina Chowdhury, Sam Behjati, Angela Polanco   +56 more
wiley   +1 more source

Comparison theorems for fourth order differential equations

International Journal of Mathematics and Mathematical Sciences, 1986
This paper establishes an apparently overlooked relationship between the pair of fourth order linear equations yiv−p(x)y=0 and yiv+p(x)y=0, where p is a positive, continuous function defined on [0,∞).
Garret J. Etgen, Willie E. Taylor
doaj   +1 more source

Virial theorem in scalar tensor fourth order gravity

European Physical Journal C: Particles and Fields, 2021
In this paper, we study, in the Newtonian limit, the virial theorem in the context of a scalar tensor fourth order gravity. In particular, we show, that for a isolated galaxy in viral equilibrium, a specific class of scalar tensor fourth order gravity, i.
A. Capolupo, G. Lambiase, A. Stabile, An. Stabile   +3 more
doaj   +1 more source

Fourth-order flows in surface modelling [PDF]

, 2013
This short article is a brief account of the usage of fourth-order curvature flow in surface ...
Kang, Ty
core  

Weak Gravitational Lensing in Fourth Order Gravity

, 2011
For a general class of analytic $f(R,R_{\alpha\beta}R^{\alpha\beta},R_{\alpha\beta\gamma\delta}R^{\alpha\beta\gamma\delta})$ we discuss the gravitational lensing in the Newtonian Limit of theory.
Stabile, A., Stabile, An.
core   +1 more source

Fourth-order dispersion mediated modulation instability in dispersion oscillating fibers [PDF]

, 2013
We investigate the role played by fourth-order dispersion on the modulation instability process in dispersion oscillating fibers. It not only leads to the appearance of instability sidebands in the normal dispersion regime (as in uniform fibers), but ...
Armaroli, Andrea, Biancalana, Fabio, Bouwmans, Geraud, Droques, Maxime, Kudlinski, Alexandre, Martinelli, Gilbert, Mussot, Arnaud   +6 more
core   +1 more source