Authors: Ghilezan, Silvia 
Affiliations: Mathematics 
Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: Type Systems for Trustworthiness –- from Mathematics to Large-Scale Systems (keynote)
First page: 1
Last page: 2
Conference: ECBS 2021: 7th Conference on the Engineering of Computer Based Systems, Novi Sad, Serbia, May 26 - 27, 2021
Issue Date: 26-May-2021
Rank: M32
ISBN: 978-1-4503-9057-6
DOI: 10.1145/3459960.3461562
Fast developments of information technologies with rapidly emerging new disciplines and their application in all segments of life and society permanently urge for the development of foundational aspects based on solid theoretical concepts. Early work on the foundations of mathematics, George Cantor’s Naïve set theory was fostering paradoxes which were singled out by Bertrand Russell: Does the set of sets not containing themself contain itself? Or not? At the beginning of the XX century, Type theory was a way out of these paradoxes preventing the expression “the set does not contain itself” to be a valid predicate anymore, since sets and their elements belong to different types. To this end, type theory has provided trustworthiness to logic and foundations of mathematics.
The Curry-Howard correspondence is a deep result that connects logic and computation wherein mathematical proofs coincide with computer programs and formulae with types. With this respect, types have gained an important role in the analysis of formal systems. A type system splits elements (terms, programs) of a language into sets, called types, and proves absence of certain undesired behaviors. In programming languages, types represent a well-established technique to ensure program correctness. Accordingly, types have provided trustworthiness to foundations of programming languages. Nowadays, there is a plethora of type systems in logic, programming languages, distributed and large scale systems which establish trustworthiness of the particular framework.
In this talk, we present some significant type systems - functional types, behavioural types, linked data types - along with their properties such as type safety, liveness, deadlock freedom and discuss their role for ensuring trustworthiness.
Publisher: Association for the Computing Machinery

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