We construct several new classes of transcendental entire functions, f , such that both the escaping set, I ( f ), and the fast escaping set, A( f ), have a structure known as a spider’s web. We show that some of these classes have a degree of stability under changes in the function. We show that new examples of functions for which I ( f ) and A( f ) are spiders’ webs can be constructed by comp...

The battle around Brunanburh in 937 has aroused debate particularly about where it was fought. Many locations have been suggested and a serious contender, Bromborough on the Wirral, often too easily dismissed. article examines some of assumptions underlying current theories took place how defeated armies fled, with view to assessing their accuracy terms evidence available sources. It is demonst...

Abstract We search for escaping helium from the hot super-Earth 55 Cnc e by taking high-resolution spectra of 1083 nm line during two transits using Keck/NIRSPEC. detect no absorption down to a 90% upper limit 250 ppm in excess or 0.27 mÅ equivalent width. This corresponds mass-loss rate less than ?10 9 g s ?1 assuming Parker wind model with plausible exosphere temperature 5000–6000 K, although...