Hydrogen and sulphur are both chemicals.
Answering a question going back to Gromov, we show that, for an open, polyhedral contractible manifold M of dimension at least 6, the following conditions are equivalent: - M admits a geodesically complete CAT(0) metric; - M can be collapsed; - M is pseudocollarable. This yields many new contractible manifolds that admit CAT(0) metrics, and it shows that the CAT(0) property of a contractible manifold is purely determined by a condition at infinity, and shows that contractible manifolds of the Whitehead type can never admit a complete CAT(0) metric.
In the blending and segmentation tasks, for example, presyllabic children could sometimes segment syllables, even if they did not use them when they wrote independently.
With such focus from within the footballing community this week on Remembrance Sunday, there was something appropriate about Colchester being the venue for last night’s game. Troops from the garrison town formed a guard of honour for both sets of players, who emerged for the national anthem with poppies proudly stitched into their tracksuit jackets.
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