Commentary on Robert Riley's article "A personal account of the discovery of hyperbolic structures on some knot complements"

We give some background and biographical commentary on the postumous article that appears in this [journal issue | ArXiv] by Robert Riley on his part of the early history of hyperbolic structures on some compact 3-manifolds. A complete list of Riley's publications appears at the end of the article.Comment: 5 page

Symmetries of quasiplatonic Riemann surfaces

We state and prove a corrected version of a theorem of Singerman, which relates the existence of symmetries (anticonformal involutions) of a quasiplatonic Riemann surface $\mathcal S$ (one uniformised by a normal subgroup $N$ of finite index in a cocompact triangle group $\Delta$) to the properties of the group $G=\Delta/N$. We give examples to illustrate the revised necessary and sufficient conditions for the existence of symmetries, and we relate them to properties of the associated dessins d'enfants, or hypermaps

Universal Tessellations

Sin resume

Using Clickers for Data Collection for Enterprise Budgets

Audience response receivers, or clickers, provide a convenient and efficient way to collect data for developing enterprise budgets. The use of clickers allows the Extension specialist to ask growers for individual farm data while guaranteeing confidentiality and anonymity. In addition, setting up a session for collecting the data from a panel of producers is less costly and time consuming than conducting one-on-one interviews. But perhaps the greatest advantage of this methodology is that it allows for keeping up with the rapid pace of change in growers\u27 practices

Critical Fontana

Review of Lucio Fontana: Between Utopia and Kitsch by Anthony White. Cambridge, MA: MIT Press, 2011. 336 pp. $29.95 cloth