Drs Evans and Davies comment

Moorland vegetation burning debates should avoid contextomy and anachronism: a comment on Davies et al. (2016)

& 2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. The accompanying reply can be viewed at http://dx.doi.org/10.1098/rstb.2016.0434. Moorland vegetation burning debates should avoid contextomy and anachroni...

Normal Drinking in Recovered Alcohol Addicts. Further Comment on the Article by D. L. Davies.

Tim Borer and Thomas Davies

Dirac is a hybrid motion-compensated codec that uses modern techniques such as wavelet transforms and arithmetic coding. It is an open technology which means that it is freely available and can be used without the payment of licence fees. Open technology is well suited to the business model of public service broadcasters as it allows open collaboration by those interested in its future developm...

Drs. Negoescu and Abraham reply.

Definable Davies’ Theorem

We prove the following descriptive set-theoretic analogue of a Theorem of R.O. Davies: Every Σ2 function f : R× R → R can be represented as a sum of rectangular Σ2 functions if and only if all reals are constructible.