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Propositional proof system
inference rules. Frege systems (more often known as Hilbert systems in general proof theory) are named after Gottlob Frege. The name "Frege system" was first
Frege_system
German philosopher, logician, and mathematician (1848–1925)
Friedrich Ludwig Gottlob Frege (/ˈfreɪɡə/; German: [ˈɡɔtloːp ˈfreːɡə]; 8 November 1848 – 26 July 1925) was a German philosopher, logician, and mathematician
Gottlob_Frege
System of formal deduction in logic
Hilbert–Ackermann system, is a type of formal proof system attributed to Gottlob Frege and David Hilbert. These deductive systems are most often studied
Hilbert_system
Field in logic and theoretical computer science
various propositional proof systems. For example, among the major challenges of proof complexity is showing that the Frege system, the usual propositional
Proof_complexity
propositional proof systems such as Frege system and are, in particular, useful for constructing polynomial-size proofs in these systems. The characterization
Bounded_arithmetic
Natural deduction Sequent calculus Frege system Extended Frege system Polynomial calculus Nullstellensatz system Cutting-plane method Semantic tableau
Propositional_proof_system
derived purely from a logical system, undermining the logicist program. Some notable logicists include: Gottlob Frege: Frege is often regarded as the founder
Mathematical_object
Metatheorem
In metalogic and metamathematics, Frege's theorem is a metatheorem that states that the Peano axioms of arithmetic can be derived in second-order logic
Frege's_theorem
Branch of logic
Geometry, in propositional logic it dates back to Gottlob Frege's 1879 Begriffsschrift. Frege's system used only implication and negation as connectives. It
Propositional_logic
1843 book by John Stuart Mill
strong influence on scientists such as Dirac. A System of Logic also had an impression on Gottlob Frege, who rebuked many of Mill's ideas about the philosophy
A_System_of_Logic
Philosophical problem about Frege's distinction between concept and object
The concept "horse" paradox (also known as the concept horse problem or Frege's concept horse paradox; German: der Begriff Pferd) is a problem in the philosophy
Concept_horse_paradox
Number expressed in the base-2 numeral system
popular idea that would be followed closely by his successors such as Gottlob Frege and George Boole in forming modern symbolic logic. Leibniz was first introduced
Binary_number
Distinction in the philosophy of language
reference was an idea of the German philosopher and mathematician Gottlob Frege in 1892 (in his paper "On Sense and Reference"; German: "Über Sinn und Bedeutung")
Sense_and_reference
Mathematical model for deduction or proof systems
times, contributors include George Boole, Augustus De Morgan, and Gottlob Frege. Mathematical logic was developed in 19th century Europe. David Hilbert
Formal_system
1879 book on logic by Gottlob Frege
'concept-writing') is a book on logic by Gottlob Frege, published in 1879, and the formal system set out in that book. Begriffsschrift is usually translated
Begriffsschrift
School of thought in philosophy of mathematics
1900–1901). Frege gave up on the project after Russell recognized and communicated his paradox identifying an inconsistency in Frege's system set out in
Logicism
Axiom(s) of Set Theory
commonly employed in axiomatic set theory, and a system based on equinumerosity that was proposed by Gottlob Frege and by Bertrand Russell. In Zermelo–Fraenkel
Set-theoretic definition of natural numbers
Set-theoretic_definition_of_natural_numbers
Paradox in set theory
derived in the axiomatic system constructed by the German philosopher and mathematician Gottlob Frege, hence undermining Frege's attempt to reduce mathematics
Russell's_paradox
Thought (1854) and Frege's Begriffsschrift (1879) defined the modern form of symbolic mathematical logic. Building on Frege's system, Russell and Whitehead
History of artificial intelligence
History_of_artificial_intelligence
(modus ponens and substitution), and six axioms. Frege referred to the "completeness" of this system, but was unable to prove this. The most significant
History_of_logic
Class of formal logics
Classical logic (or standard logic) or Frege–Russell logic is the intensively studied and most widely used class of deductive logic. Classical logic has
Classical_logic
Logical principles
the rejection of psychologism in the 19th century by some authors (e.g., Frege, Husserl) psychology and logic are considered to be separate disciplines
Law_of_thought
Mathematical term; concerning axioms used to derive theorems
2024 ed.). ISSN 1095-5054. OCLC 429049174. Zalta, Edward N. (Aug 5, 2023). "Frege's Theorem and Foundations for Arithmetic". In Zalta, Edward N. (ed.). Stanford
Axiomatic_system
Graph operation
also imply the existence of non-polynomial bounds on certain types of Frege system in mathematical logic. The minimum size of an expression tree describing
Hajós_construction
View that mathematics does not necessarily represent reality, but is more akin to a game
found in Gottlob Frege's criticisms in The Foundations of Arithmetic. According to Alan Weir, the formalism of Heine and Thomae that Frege attacks can be
Formalism (philosophy of mathematics)
Formalism_(philosophy_of_mathematics)
Mathematician and philosopher (1906–1978)
cosmologist, and philosopher. Considered along with Aristotle and Gottlob Frege to be one of the most significant logicians in history, Gödel profoundly
Kurt_Gödel
Every set is smaller than its power set
R_{U}\notin R_{U}).} Had we used unrestricted comprehension (as in Frege's system for instance) by defining the Russell set simply as R = { x : x ∉ x
Cantor's_theorem
Early-20th-century development in Western philosophy
linguistic turn can be dated to Gottlob Frege's 1884 work The Foundations of Arithmetic, specifically paragraph 62 where Frege explores the identity of a numerical
Linguistic_turn
Principle in linguistics about meaning
rules used to combine them. The principle is also called Frege's principle, because Gottlob Frege is widely credited for the first modern formulation of
Principle_of_compositionality
German-born British philosopher (born 1960)
the 2021 extended essay "Frege plagiarized the Stoics", based on her 2016 Keeling Lecture, Bobzien argues in detail that Frege plagiarized them on a large
Susanne_Bobzien
20th-century tradition of Western philosophy
second half of the century. Central figures in its history include Gottlob Frege, Bertrand Russell, G. E. Moore, and Ludwig Wittgenstein. Other important
Analytic_philosophy
Metaphysics concept covering the divide between two types of entities
and concrete was explored by Immanuel Kant and G. W. F. Hegel. Gottlob Frege said that abstract objects, such as propositions, were members of a third
Abstract_and_concrete
Concept in semiotics
A sign system is a key concept in semiotics and is used to refer to any system of signs and relations between signs. The term language is frequently used
Sign_system
Austrian-German philosopher and mathematician (1859–1938)
context as the basis of mathematics. It drew the adverse notice of Gottlob Frege, who criticized its psychologism. In 1901, Husserl, with his family, moved
Edmund_Husserl
Logical principle
Boolos. The principle plays a central role in Gottlob Frege's philosophy of mathematics. Frege shows that HP and suitable definitions of arithmetical
Hume's_principle
Subfield of mathematics
to develop a logical system for relations and quantifiers, which he published in several papers from 1870 to 1885. Gottlob Frege presented an independent
Mathematical_logic
Approach in philosophy of mathematics and logic
Frege's rules of self-reference was self-contradictory. In an appendix to the second volume, Frege acknowledged that one of the axioms of his system did
Intuitionism
Specialty in philosophy, focused on German language origin
contemporary philosophical schools: analytic philosophy such as Gottlob Frege, Ludwig Wittgenstein, and the logical positivist Vienna Circle; and continental
German_philosophy
Style of formal logical argumentation
calculus, such as Frege's propositional calculus or Jan Łukasiewicz's axiomatization (itself a part of the standard Hilbert system): Every formula that
Sequent_calculus
About mathematical functions
21–22. This example is from Frege 1879 in van Heijenoort 1967, pp. 21–22 Frege 1879 in van Heijenoort 1967, pp. 21–22 Frege cautions that the function
History of the function concept
History_of_the_function_concept
Limitative results in mathematical logic
have severe consequences for the program of logicism proposed by Gottlob Frege and Bertrand Russell, which aimed to define the natural numbers in terms
Gödel's incompleteness theorems
Gödel's_incompleteness_theorems
British-American philosopher (1909–1988)
publishing studies of the work of philosophers such as Frege. His translation (with Peter Geach) of Frege's published philosophical writing is a classic text
Max_Black
Subfield of automated reasoning and mathematical logic
centuries saw the development of modern logic and formalized mathematics. Frege's Begriffsschrift (1879) introduced both a complete propositional calculus
Automated_theorem_proving
Country in Europe
Friedrich Engels; Friedrich Nietzsche's development of perspectivism; Gottlob Frege's contributions to the dawn of analytic philosophy; Martin Heidegger's works
Germany
Branch of philosophy
the constitution of sentences, concepts, learning, and thought. Gottlob Frege and Bertrand Russell were pivotal figures in analytic philosophy's "linguistic
Philosophy_of_language
German mathematician (1841–1902)
except Frege ever published a single paper in Frege's notation, many famous logicians adopted Peirce-Schröder notation, and famous results and systems were
Ernst Schröder (mathematician)
Ernst_Schröder_(mathematician)
British philosopher (1925–2011)
wrote on the history of analytic philosophy, notably as an interpreter of Frege, and made original contributions particularly in the philosophies of mathematics
Michael_Dummett
1931 paper by Kurt Gödel
translation. A translation by Jean van Heijenoort appears in the collection From Frege to Gödel: A Source Book in Mathematical Logic (van Heijenoort 1967). A review
On Formally Undecidable Propositions of Principia Mathematica and Related Systems
On_Formally_Undecidable_Propositions_of_Principia_Mathematica_and_Related_Systems
German polymath (1646–1716)
modern logic had been created by Charles Sanders Peirce and by Gottlob Frege. Leibniz thought symbols were important for human understanding. He attached
Gottfried_Wilhelm_Leibniz
American mathematician and computer scientist (1903–1995)
the unsolvability of the Entscheidungsproblem ("decision problem"), the Frege–Church ontology, and the Church–Rosser theorem. Alongside his doctoral student
Alonzo_Church
Literal meaning of an expression
written in the book Course in General Linguistics. Philosophers Gottlob Frege and Bertrand Russell have also made influential contributions to this subject
Denotation
Strawson 1950, Prior 1976, Mill 1908 Ockham, Summa Logicae Frege 1892 Peter of Spain 1947 Frege, G. (1892) "On Sense and Reference", originally published
Singular_term
Cognitive science issue
acquisition." Artificial cognition systems. IGI Global, 2007. 176–209. Harnad 1990. Harnad 2001a. Searle 1980. Frege 1952. Peirce, Charles S. The philosophy
Symbol_grounding_problem
Branch of mathematics that studies sets
membership. Possibly most prominently, Gottlob Frege began to develop his Foundations of Arithmetic. In his work, Frege tries to ground all mathematics in terms
Set_theory
Study of mathematics itself
roughly, "concept-script") is a book on logic by Gottlob Frege, published in 1879, and the formal system set out in that book. Begriffsschrift is usually translated
Metamathematics
Formal language used to prove statements
interest in syllogisms, carried out under the aegis of term logic. Gottlob Frege's two-dimensional notation of the Begriffsschrift (1879) is usually regarded
Proof_calculus
Theory in philosophy of language
Wittgenstein. In the 19th century, mathematician and philosopher Gottlob Frege also argued against it, and contrasted it with mediated reference theory
Direct_reference_theory
American philosopher
(2002): The comparability of Frege's and Kant's systems is disputed in scholarly discourse. MacFarlane argues that the systems are indeed comparable, because
John_MacFarlane_(philosopher)
Sequence of words formed by specific rules
manipulated through Symbolic equations. Gottlob Frege attempted to realize Leibniz's ideas, through a notational system, first outlined in Begriffsschrift (1879)
Formal_language
Statement that is taken to be true
mathematical objects, and mathematics itself can be regarded as a branch of logic. Frege, Russell, Poincaré, Hilbert, and Gödel are some of the key figures in this
Axiom
Austrian philosopher
Philosophy of Arithmetic), and Kazimierz Twardowski, but also on Gottlob Frege. In fact, Frege conceived his paper "Concept and Object" as a reply to Kerry's criticisms
Benno_Kerry
Type of logical system
foundations of first-order logic were developed independently by Gottlob Frege and Charles Sanders Peirce in the 1880s. However, the distinction between
First-order_logic
American philosopher and logician
philosophy of language, logic, metaphysics, epistemology and the philosophy of Frege and Russell. He is best known for his work on demonstratives, propositions
David_Kaplan_(philosopher)
Formatted data in computer science
Polytechnique Fédérale de Lausanne. "clojure/clojure". GitHub. 8 December 2022. "Frege/frege". GitHub. 7 December 2022. Johan Tibell, A. Announcing unordered-containers
Hash_array_mapped_trie
Spanish computer scientist
Toniann; Raz, Ran (2000), "On interpolation and automatization for Frege systems" (PDF), SIAM Journal on Computing, 29 (6): 1939–1967, doi:10.1137/S0097539798353230
María_Luisa_Bonet
Number used for counting
cardinality, or measuring how many elements there are in a set". Frege, Gottlob; Frege, Gottlob (1975) [1953]. The foundations of arithmetic: a logico-mathematical
Natural_number
Name which is taken to uniquely identify its referent in the world
applied principles of formal logic to linguistic propositions. Gottlob Frege pointed out that proper names may apply to imaginary or nonexistent entities
Proper_name_(philosophy)
Springer–Verlag, 1955. G. Mints and A. Kojevnikov, Intuitionistic Frege systems are polynomially equivalent, Zapiski Nauchnyh Seminarov POMI 316 (2004)
Admissible_rule
Manœuvre (6–8) Marco Prince (8) Maurane (9–10) Olivier Bas (9–10) Elodie Frégé (11–12) Yarol Poupaud (11) JoeyStarr (12) Benjamin Biolay (13) Dany Synthé
List of reality television show franchises (H–Z)
List_of_reality_television_show_franchises_(H–Z)
Study of the development of philosophy
that whether something is good can be known through intuition. Gottlob Frege (1848–1925) was another pioneer of the analytic tradition. His development
History_of_philosophy
American philosopher and logician (1940–1996)
philosopher Gottlob Frege. Boolos proved a conjecture due to Crispin Wright (and also proved, independently, by others), that the system of Frege's Grundgesetze
George_Boolos
View that there are statements that are both true and false
paraconsistent logic to resurrect the program of logicism advocated for by Frege and Russell. This even allows one to prove the truth of otherwise unprovable
Dialetheism
English philosopher and logician (1872–1970)
the paradoxes in Frege's approach, it was later proven by Kurt Gödel that neither Principia Mathematica, nor any other consistent system of primitive recursive
Bertrand_Russell
B}{B}}.} We assume this rule is included in all systems below unless stated otherwise. Frege's axiom system: A → ( B → A ) {\displaystyle A\to (B\to A)}
List of axiomatic systems in logic
List_of_axiomatic_systems_in_logic
He continued working on the second volume up to at least 1894. Gottlob Frege was critical of Philosophy of Arithmetic, and accused Husserl of relying
Philosophy_of_Arithmetic
Study of correct reasoning
of late 19th-century mathematicians such as Gottlob Frege. Today, the most commonly used system is classical logic. It consists of propositional logic
Logic
Logical incompatibility between two or more propositions
Bird, D. Reidel, Dordrecht, South Holland. Jean van Heijenoort 1967 From Frege to Gödel: A Source Book in Mathematical Logic 1879-1931, Harvard University
Contradiction
German philosopher (1770–1831)
to Hegel's project. Twentieth-century developments by such logicians as Frege and Russell likewise remain logics of formal validity and so are likewise
Georg_Wilhelm_Friedrich_Hegel
Informal set theories
study of infinite sets and developed as a formal but inconsistent system by Gottlob Frege in his Grundgesetze der Arithmetik. Naive set theory may refer
Naive_set_theory
Bearer of truth values
from Aristotle and the Stoics, and later from William of Ockham, Gottlob Frege, and Bertrand Russell. Propositions are relevant to many fields. Logicians
Proposition
Symbol with multiple meanings
logically equivalent when all models give them the same value. Gottlob Frege used a triple bar for a more philosophical notion of identity, in which
Triple_bar
Axioms for the natural numbers
been introduced in the Begriffsschrift by Gottlob Frege, published in 1879. Peano was unaware of Frege's work and independently recreated his logical apparatus
Peano_axioms
French philosopher and essayist (1915–1980)
and semiotician. His work engaged in the analysis of a variety of sign systems, mainly derived from Western popular culture. His ideas explored a diverse
Roland_Barthes
German philosopher (1788–1860)
Wittgenstein rejected epistemological transcendental idealism for Gottlob Frege's conceptual realism. In later years, Wittgenstein became highly dismissive
Arthur_Schopenhauer
Concept in metaphysics
to the German concept of Aussage. In Grundlagen, for instance, Gottlob Frege used this term to state that a statement of a number contains a predication
Predication_(philosophy)
Study of parts and the wholes they form
der Logik" (1890), also used the mereological conception. It was Gottlob Frege, in a 1895 review of Schröder's work, who first laid out the difference
Mereology
Theorem in formal logic
threatened the entire structure of mathematics. Mathematicians such as Gottlob Frege, Ernst Zermelo, Abraham Fraenkel, and Thoralf Skolem put much effort into
Principle_of_explosion
Austrian philosopher and logician (1889–1951)
back into logic and mathematics. Wittgenstein wanted to study with Frege, but Frege suggested he attend the University of Cambridge to study under Russell
Ludwig_Wittgenstein
Type of logical argument that applies deductive reasoning
superseded by first-order predicate logic following the work of Gottlob Frege, in particular his Begriffsschrift (Concept Script; 1879). Syllogism, being
Syllogism
State of being real
connects an entity to the world it inhabits. According to philosopher Gottlob Frege (1848–1925), actuality is narrower than existence because only actual entities
Existence
Transforming a function in such a way that it only takes a single argument
cobordisms, and string theory. The concept of currying was introduced by Gottlob Frege, developed by Moses Schönfinkel, and further developed by Haskell Curry
Currying
Study of general and fundamental questions
prominence in the early 20th century in analytic philosophy due to the works of Frege and Russell. One of its central topics is to understand how sentences get
Philosophy
List of programming software
Sun. Oracle then stopped development in 2012, according to Dr. Dobb's. Frege, a non-strict, pure functional language in the spirit of Haskell Golo, a
List_of_JVM_languages
Polish-American scholar and philosopher (1879–1950)
redirect targets Concept and object – Philosophical distinction by Gottlob Frege E-Prime – Restricted form of the English language Institute of General Semantics –
Alfred_Korzybski
Sequence of operations for a task
ISBN 978-0-393-32229-3. Davis offers concise biographies of Leibniz, Boole, Frege, Cantor, Hilbert, Gödel and Turing with von Neumann as the show-stealing
Algorithm
Structured system of communication
Language is a structured system of communication that consists of grammar and vocabulary. It is the primary means by which humans convey meaning, both
Language
Kind of proof calculus
axiomatizations of deductive reasoning common to the systems of Hilbert, Frege, and Russell (see, e.g., Hilbert system). Such axiomatizations were most famously
Natural_deduction
development of number systems across various civilizations and time periods. These works cover topics ranging from ancient numeral systems and arithmetic methods
List of books on history of number systems
List_of_books_on_history_of_number_systems
Non-contradiction of a theory
book}}: ISBN / Date incompatibility (help) van Heijenoort, Jean (1967). From Frege to Gödel: A Source Book in Mathematical Logic. Cambridge, MA: Harvard University
Consistency
Basic distinction in philosophy
hypothesis. Partially in response to Kant's rationalism, logician Gottlob Frege applied objectivity to his epistemological and metaphysical philosophies
Subjectivity and objectivity (philosophy)
Subjectivity_and_objectivity_(philosophy)
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