‘Deform[ing] Hercules’ in Wilkie Collins’s Antonina

The Hercules-aquila Cloud

We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The Cloud is centered at a Galactic longitude of l ≈ 40◦ and extends above and below the Galactic plane by at least 50◦. Given its off-centeredness and height, it is unlikely that the Hercules-Aquila Cloud is related to the bulge or thick disk. More likely, this is a new str...

Forthcoming Hercules Specialised Courses

4—5 europe's leading light plans a bright future 6—7 the big challenge: reaching the nanoscale 9—10 esrf 'village' will encourage closer working 11—12 looking closer at matter and its chemistry 13—14 smaller, faster, stronger…and all due to the upgrade 16—17 new communities discover the esrf's appeal 19—21 the machine: Accelerator and X-ray source get makeover 22 Good ingredients aid experiment...

Deforming Diamond

For materials science, diamond crystals are almost unrivaled for hardness and a range of other properties. Yet, when simply abstracting the carbon bonding structure as a geometric bar-and-joint periodic framework, it is far from rigid. We study the geometric deformations of this type of framework in arbitrary dimension d, with particular regard to the volume variation of a unit cell.

Dissipation in Deforming Chaotic Billiards

Hercules versus Hidden Hydra Helper

L. Kirby and J. Paris introduced the Hercules and Hydra game on rooted trees as a natural example of an undecidable statement in Peano Arithmetic. One can show that Hercules has a “short” strategy (he wins in a primitively recursive number of moves) and also a “long” strategy (the finiteness of the game cannot be proved in Peano Arithmetic). We investigate the conflict of the “short” and “long”...