from Reuters Times Higher Education: The 50 universities and research institutes listed above were among the world’s most influential in the field of mathematics – whether by total citations received or by citations per paper – for papers published during the period 1 January 2001 to 28 February 2011. This table ranks the institutions by citation impact, or citations per paper. The number of highly cited papers in the field for each institution is also listed, as well as the percentage of highly cited papers in terms of total output for each. Highly cited papers are defined as papers that rank in the top 1 per cent by citations for their field and year of publication.
In the current edition of Essential Science Indicators, 200 institutions are listed in the field of mathematics, which is defined by a set of journals devoted to pure mathematics, applied mathematics, statistics and probability. Since Essential Science Indicators presents only the top 1 per cent of institutions in a field in terms of total citations earned, this means some 20,000 institutions were surveyed to obtain these results. Of the 200 institutions, 78 received 3,000 or more citations during the period, so all those listed above rank in the top one-half of 1 per cent by citations. The average citation impact in mathematics during the 10-year and two-month period surveyed here was 3.26.