decidable language
91Garbage collection (computer science) — This article is about garbage collection in memory management. For garbage collection in an SSD, see garbage collection (SSD). For other uses, see garbage collection. In computer science, garbage collection (GC) is a form of automatic memory… …
92Space hierarchy theorem — In computational complexity theory, the space hierarchy theorems are separation results that show that both deterministic and nondeterministic machines can solve more problems in (asymptotically) more space, subject to certain conditions. For… …
93Gödel's completeness theorem — is a fundamental theorem in mathematical logic that establishes a correspondence between semantic truth and syntactic provability in first order logic. It was first proved by Kurt Gödel in 1929. A first order formula is called logically valid if… …
94Mathematical logic — (also known as symbolic logic) is a subfield of mathematics with close connections to foundations of mathematics, theoretical computer science and philosophical logic.[1] The field includes both the mathematical study of logic and the… …
95Undecidable — has more than one meaning:;In mathematical logic: * A decision problem is called (recursively) undecidable if no algorithm can decide it, such as for Turing s halting problem; see also under Decidable and Undecidable problem. * Undecidable is… …
96Free group — In mathematics, a group G is called free if there is a subset S of G such that any element of G can be written in one and only one way as a product of finitely many elements of S and their inverses (disregarding trivial variations such as st 1 =… …
97Locality of reference — In computer science, locality of reference, also known as the principle of locality, is the phenomenon of the same value or related storage locations being frequently accessed. There are two basic types of reference locality. Temporal locality… …
98Enumeration — In mathematics and theoretical computer science, the broadest and most abstract definition of an enumeration of a set is an exact listing of all of its elements (perhaps with repetition). The restrictions imposed on the type of list used depend… …
99Complexity class — In computational complexity theory, a complexity class is a set of problems of related resource based complexity. A typical complexity class has a definition of the form: the set of problems that can be solved by an abstract machine M using… …
100Sheila Greibach — (1939 ) is a researcher in formal languages, automata, compiler theory in particular; and computer science in general. She is currently Professor of Computer Science at the University of California, Los Angeles.She worked with Seymour Ginsburg… …
