homotopy theory C.1. Lifting properties, weak factorization systems, and Leibniz closure C.1.1. Lemma. Any class of maps characterized by a right lifting property is closed under composition, product, pullback, retract, and limits of towers; see Lemma C.1.1. Proof. For now see [17, 11.1.4] and dualize. On account of the dual of Lemma C.1.1, any set of maps in a cocomplete category “cellularly g...

Jonathan M. Borwein unexpectedly died on 2 August 2016, in London, Ontario, Canada, where he had been visiting on leave from home institution, the University of Newcastle, Australia. Since his death, the present author and Nelson H. F. Beebe of the University of Utah have been collecting Borwein’s many published papers, books, reports and talks, as well as a number of articles written by others...

Bellos’s (2010) Grapes of Math is not a book about the history mathematics, although he includes maths histories. It math textbook, leads reader through variety mathematical concepts. does follow life great mathematician, scientist, or philosopher, they make their presence known throughout book. Rather, it lies at intersection these stories, stories ideas and cultures that informed development....

The advent of fast-casual Mexican-style dining establishments, such as Chipotle and Qdoba, has greatly improved the productivity of research mathematicians and theoretical computer scientists in recent years. Still, many experience confusion upon encountering burritos for the first time. Numerous burrito tutorials (of varying quality) are to be found on the Internet. Some describe a burrito as ...