Logic and Foundations

Typically, a logic consists of a formal or informal language together with a deductive system and/or a model-theoretic semantics.

Every set is smaller than its power set

In mathematics, specifically set theory, the continuum hypothesis (abbreviated CH) is a hypothesis

In the field of mathematical logic, a clear distinction is made between two notions of axioms: logical and non-logical.

However, it demonstrates a general technique that has since been used in a wide range of proofs, including the first of Gödel's incompleteness theorems and Turing's answer to the Entscheidungsproblem.

The P = NP problem can also be stated as a question about expressive power in descriptive complexity.

Gödel's incompleteness theorems are two theorems of mathematical logic that are concerned with the limits of provability in formal axiomatic theories.

In the philosophy of mathematics, the abstraction of actual infinity

In computer science and mathematical logic the Turing degree (named after Alan Turing) or degree of unsolvability of a set of natu

nt consistency theorem is an important theorem of mathematical logic.

In mathematical logic, a theory is categorical if it has exactly one model (up to isomorphism).

In mathematical logic and computer science, Gabbay's separation theorem states that any formula in linear temporal logic (LTL) wit

In mathematical logic, a deduction theorem is a metatheorem that justifies doing conditional proofs from a hypothesis in systems t

In mathematical logic, a theory can be extended with new constants or function names under certain conditions with assurance that

In modal logic, Sahlqvist formulas are a certain kind of modal formula with remarkable properties.

In logic, soundness can refer to either a property of arguments or a property of formal deductive systems.

In logic, mathematics, and computer science, arity ( ) is the number of arguments or operands taken by a function, operation or re

In logic, negation, also called the logical not or logical complement, is an operation that takes a proposition P to another propo

In mathematical logic, a sequent is a very general kind of conditional assertion.

In quantified modal logic, the Barcan formula and the converse Barcan formula (more accurately, schemata rather than formulas) (i)

In mathematical logic, Craig's interpolation theorem is a result about the relationship between different logical theories.

In mathematical logic, the Beth definability theorem is a fundamental result in logic that states a property implicitly defined by

In mathematical logic, an omega-categorical theory is a theory that has exactly one countably infinite model up to isomorphism.

In mathematical logic, a formula is said to be absolute to some class of structures (also called models), if it has the same truth

ph property definable in the monadic second-order logic of graphs can be decided in linear time on graphs of bounded treewidth.

In mathematical logic, the diagonal lemma (also known as diagonalization lemma, self-reference lemma or fixed point theorem) estab

In metalogic and metamathematics, Frege's theorem is a metatheorem that states that the Peano axioms of arithmetic can be derived

In mathematical logic, the Barwise compactness theorem, named after Jon Barwise, is a generalization of the usual compactness theo

In mathematical logic and computer science, Kamp's theorem states that linear temporal logic is equivalent to the monadic first-or

In mathematical logic, Goodstein's theorem is a statement about the natural numbers, proved by Reuben Goodstein in 1944, which sta

who presented the theorem in 1959, is a result in mathematical logic that states that no countable nonstandard model of first-orde

mathematical logic

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logic

foundations of mathematics

mathematical logic

logic

Curry is best known for his work in combinatory logic.

known for the invention of combinatory logic

is an Israeli logician

Goodstein's theorem was among the earliest examples of theorems found to be unprovable in Peano arithmetic

best known for his work in mathematical logic

who worked in the field of foundations and mathematical logic

Evert Willem Beth (7 July 1908-12 April 1964) was a Dutch philosopher and logician, whose work principally concerned the foundations of mathematics.

George Boole ( BOOL; 2 November 1815-8 December 1864) was an English mathematician and philosopher often credited with revolutionizing logic by transforming it from a philosophical study of language into a mathematical system of algebraic equations using binary values and logical operators.

John Barkley Rosser Sr. (December 6, 1907, September 5, 1989) was an American logician, a student of Alonzo Church, and known for his part in the Church-Rosser theorem in lambda calculus.

Leopold Löwenheim [ˈle:o:pɔl̩d ˈlø:vɛnhaɪm] (26 June 1878 in Krefeld, 5 May 1957 in Berlin) was a German mathematician doing work in mathematical logic.

Per "Pelle" Lindström (9 April 1936-21 August 2009, Gothenburg) was a Swedish logician, after whom Lindström's theorem and the Lindström quantifier are named. (He also independently discovered Ehrenfeucht-Fraïssé games.) He was one of the key followers of Lars Svenonius.

Bernard Bolzano (UK: , US: ; German: [bɔlˈtsaːno]; Italian: [bolˈtsaːno]; born Bernardus Placidus Johann Nepomuk Bolzano; 5 October 1781-18 December 1848) was a Bohemian mathematician, logician, philosopher, theologian and Catholic priest of Italian extraction, also known for his liberal views.

Kenneth Jon Barwise (; June 29, 1942, March 5, 2000) was an American mathematician, philosopher, and logician who proposed some fundamental revisions to the way that logic is understood and used.

Ernst Friedrich Ferdinand Zermelo (; German: [tsɛɐ̯ˈmeːlo]; 27 July 1871-21 May 1953) was a German logician and mathematician, whose work has major implications for the foundations of mathematics.

The B, C, K, W system is a variant of combinatory logic that takes as primitive the combinators B, C, K, and W.

The SKI combinator calculus is a combinatory logic system and a computational system.

In propositional logic, associativity is a valid rule of replacement for expressions in logical proofs.

Foundations of Mathematics Theorem Proving

Foundations of Mathematics Logic

Foundations of Mathematics Logic

Foundations of Mathematics Logic

Foundations of Mathematics Logic

Foundations of Mathematics Theorem Proving

Foundations of Mathematics Theorem Proving

Foundations of Mathematics Theorem Proving

Foundations of Mathematics Logic

computer science, the Entscheidungsproblem (German for 'decision problem'; pronounced [ɛntˈʃaɪ̯dʊŋspʁoˌbleːm]) is a challenge

In mathematics, an impossibility theorem is a theorem that demonstrates a problem or general set of problems cannot be solved. These are also known as proofs of impossibility

Foundations of Mathematics Logic

He introduced De Morgan's laws and his greatest contribution is as a reformer of mathematical logic.

Edward Nelson was an American mathematician who won the Steele Prize for applying probability to quantum field theory. He wrote several classic texts on the topic. In the latter part of his career he studied mathematical logic.

Gottlob Frege was a German mathematician who was one of the founders of modern symbolic logic putting forward the view that mathematics is reducible to logic.

Jacques Herbrand was a French mathematician who died young but made contributions to mathematical logic.

John Venn was an English mathematician and logician best known for the Venn diagrams which can be used to visualise the unions and intersections of sets.

As a mathematical logician, he was interested in increasing understanding by treating it as a game.

Moritz Pasch was a German mathematician who worked on the foundations of geometry. He found a number of assumptions in Euclid that nobody had noticed before.

Alonzo Church made important contributions to mathematical logic and theoretical computer science.