Book review: active citizenship: what could it achieve and how?

Omar El-Khairy reviews the latest title by Bernard Crick, concluding that tensions around active citizenship have never been hotter

6-loop anomalous dimension of a single impurity operator from AdS/CFT and multiple zeta values

Anomalous dimension of the simplest nontrivial single impurity operator in the beta=1/2 deformed theory is determined at six loops from the AdS/CFT correspondence. L\"uscher correction is evaluated at next-to-next-to-leading order (NNLO) in terms of multiple zeta values. The result can be simplified into the products of simple zeta functions and the same form of the correction is expected for the Konishi operator at six loops, too.Comment: 14 pages, references added, numeric coefficient in (5) corrected, which changes the numerical result, but not its structur