Consider the minimum number f(m,n) of zeroes in a 2m×2n (0, 1)-matrixM that contains no m×n submatrix of ones. This special case of the well-known Zarankiewicz problem was studied by Griggs and Ouyang, who showed, for m ≤ n, that 2n+m+1 ≤ f(m,n) ≤ 2n + 2m − gcd(m,n) + 1. The lower bound is sharp when m is fixed for all large n. They proposed determining limm→∞{f(m,m+ 1)/m}. In this paper, we sh...

Timo Henckel is a Fellow in international and development economics at the Crawford School of Economics and Government, The Australian National University Vanuatu’s economy paints a picture of contradictions: it has continued on the recent growth path with low inflation, government budget surpluses, and increased capital inflows. Yet successful management of the economy has not translated into ...

followed by premature RB beats, we must assume that RB complexes do not express conducted sinus impulses but are, in fact, escape beats, also suggested by their short H-V interval. The diagram of Figure 1 reflects a 2:1 form of A-V nodal block. This phenomenon, however, would have been the same with any other form of second-degree A-V block provided that two levels of block occur, and no retrog...

Narration will be mainly focused on the origin, course and aftermath of four far-reaching initiatives that bloomed in Italy at almost the same time, in a few months encompassing 1954 and 1955; a choice which implies unfair omission of other worthwhile but less influential happenings.

This article examines several major political and cultural issues with which the citizens of Azerbaijan are currently grappling. It considers the role of the Nogorno-Karabakh conflict and its aftermath, irredentist claims made by some on Azerbaijani portions of Iran, the place of women in society, and the role of oil. Present in all these topics, however, is the common theme of how Turkish, Rus...

Hemi-spatial neglect is a disabling, neuropsychological impairment that restricts the ability to attend to incoming information on one side space. Most frequently associated with a lesion to the right hemisphere, the disorder is strongly predictive of general functional recovery from stroke. Although the standard therapy is of limited effectiveness, pilot studies indicate that more effective tr...

To cite: Chadwick A, Thwaites V, Holland M, et al. BMJ Case Rep Published online: [please include Day Month Year] doi:10.1136/bcr-2017219841 DESCRIPTION A Nigerian-born British national aged 24 years presented to our tuberculosis (TB) clinic after a positive, screening, quantiFERON blood test. She had been in the country for 12 years, had no known exposure to TB and no previous medical history....