## Instigator

Richard Zach is logician working at the University of Calgary (Canada) where he is Professor of Philosophy. He works on the history of logic, the philosophy of logic and mathematics, and mathematical logic. He has recently used the Open Logic Text in a course on Intermediate Logic at McGill University. He’s mainly to blame for the typesetting and publishing setup of the OLT, and has contributed to most sections of the text.

## Editors and Contributors

Andrew Arana is a logician working at the University of Paris 1 Panthéon-Sorbonne (France) where he is maître de conférences (associate professor) of philosophy. He works on the history and philosophy of mathematics and logic. At Paris 1 his logic teaching includes model theory, philosophy of logic, and elementary logic. In his previous appointment as Associate Professor of Philosophy and Mathematics at the University of Illinois at Urbana-Champaign and at other institutions he has taught logic at many different levels as well. He looks forward to using this text in logic courses this academic year.

Jeremy Avigad is a logician at Carnegie Mellon University, where he is Professor of Philosophy and Mathematical Sciences. He works in mathematical logic, history and philosophy of mathematics, and formal verification. At Carnegie Mellon, he teaches logic to students in mathematics, computer science, and philosophy, from undergraduate freshmen to advanced graduate students. Sections on computability and incompleteness are based on his notes.

Walter Dean is Associate Professor of Philosophy at the University of Warwick (UK). He works in philosophy of mathematics, mathematical and philosophical logic, theoretical computer science, and the philosophy and history of computation. He regularly teaches intermediate and advanced undergraduate logic.

Gillian Russell is Professor of Philosophy at the University of North Carolina, Chapel Hill. She writes on the philosophy of language and the philosophy of logic, and often teaches advanced logic courses to philosophers.

Nicole Wyatt is a philosopher working at the University of Calgary, where she is also Head of the Department of Philosophy. She works on the philosophy of logic and language, as well as the history of computational theory. She regularly teaches Logic II, as well as Philosophy of Logic, at Calgary. She has used the Open Logic Text twice in Logic II, and contributed material to the sections on first-order logic and Turing computability.

Audrey Yap is Associate Professor of Philosophy at the University of Victoria (Canada). She works in epistemic logic, history and philosophy of mathematics, and more recently in feminist epistemology. She teaches logic from the intro level onward.

## In Memoriam

Aldo Antonelli was one of the early contributors to the Open Logic Project. Material on first-order logic and model theory are based on his lecture notes; additional material on propositional logic, axiomatic proof systems, and modal logic he provided will also be included. Aldo was a first-rate logician, who worked on non-monotonic logic, modal logic, Frege, generalized quantifiers, and abstraction principles. At UC Davis he taught logic throughout the curriculum, from introductory courses to graduate seminars. He died unexpectedly on October 11, 2015.

## Student Assistants

Samara Burns is a graduate student in philosophy at the University of Calgary. Her research interests include formal logic (especially proof theory) and the philosophy of logic. Samara was a Peer Assisted Study Session Leader for Logic II for three semesters, and used the Open Logic text in her last semester as a PASS Leader. She has contributed to several sections of the Open Logic text, including chapters on natural deduction, axiomatic deduction, and Turing machines.

Dana Hagg is a student at the University of Calgary. She graduated with distinction with a B.Sc. in Pure Mathematics and a minor in philosophy in 2015, and is currently studying law. She was a teaching assistant in the Department of Mathematics and Statistics for three years and the Peer Assisted Study Session Leader twice for Logic II, using Open Logic in her second semester in that position. Dana worked on OLT for two summers through funding from NSERC and the Department of Philosophy.

Chad Nester is a graduate student at the University of Calgary (Canada). He is working on producing an HTML and E-Book version of the Open Logic book, and has various “improvements” to the generation scheme of the book planned. He also likes computability, type theory, categorical logic, and functional programming.

Zesen Qian is an undergraduate student in computer science at Shanghai Jiao Tong University. He is interested in the connection between type theory and intuitionistic logic, and applying this connection to improve the process of software development. He was a MITACS Globalink during the 2016 summer, and contributed several chapters including untyped lambda calculus and intuitionistic logic.

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