Irish Mathematical Society Cumann Matamaitice na hEireann´ Bulletin Number 82 Winter 2018 ISSN 0791-5578 Irish Mathematical Society Bulletin The aim of the Bulletin is to inform Society members, and the math- ematical community at large, about the activities of the Society and about items of general mathematical interest. It appears twice each year. The Bulletin is published online free of charge. The Bulletin seeks articles written in an expository style and likely to be of interest to the members of the Society and the wider math- ematical community. We encourage informative surveys, biograph- ical and historical articles, short research articles, classroom notes, book reviews and letters. All areas of mathematics will be consid- ered, pure and applied, old and new. See the inside back cover for submission instructions. Correspondence concerning the Bulletin should be sent, in the first instance, by e-mail to the Editor at
[email protected] and only if not possible in electronic form to the address The Editor Irish Mathematical Society Bulletin Department of Mathematics and Statistics Maynooth University Co. Kildare W23 HW31 Further information about the Irish Mathematical Society and its Bulletin can be obtained from the IMS webpage http://www.irishmathsoc.org/ EDITORIAL It is with great sadness that I mark the very recent and untimely death of Richard Timoney, a dear friend and a mainstay of the Irish mathematical community; bitter news to hear, and bitter tears to shed. A meeting to mark his sixty-fifth birthday was already arranged, to take place at TCD in May, and there will be other tributes, but for now I must note his long and efficient service as curator of the Society’s website, which carries the digital version of the Bulletin.