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  2. Algebraic logic - Wikipedia

    en.wikipedia.org/wiki/Algebraic_logic

    In mathematical logic, algebraic logic is the reasoning obtained by manipulating equations with free variables.. What is now usually called classical algebraic logic focuses on the identification and algebraic description of models appropriate for the study of various logics (in the form of classes of algebras that constitute the algebraic semantics for these deductive systems) and connected ...

  3. Decidability of first-order theories of the real numbers

    en.wikipedia.org/wiki/Decidability_of_first...

    The theory of real closed fields is the theory in which the primitive operations are multiplication and addition; this implies that, in this theory, the only numbers that can be defined are the real algebraic numbers. As proven by Tarski, this theory is decidable; see Tarski–Seidenberg theorem and Quantifier elimination.

  4. List of axioms - Wikipedia

    en.wikipedia.org/wiki/List_of_axioms

    Axiom of Archimedes (real number) Axiom of countability ; Dirac–von Neumann axioms; Fundamental axiom of analysis (real analysis) Gluing axiom (sheaf theory) Haag–Kastler axioms (quantum field theory) Huzita's axioms ; Kuratowski closure axioms ; Peano's axioms (natural numbers) Probability axioms; Separation axiom

  5. Boolean algebra - Wikipedia

    en.wikipedia.org/wiki/Boolean_algebra

    In mathematics and mathematical logic, Boolean algebra is a branch of algebra. It differs from elementary algebra in two ways. First, the values of the variables are the truth values true and false , usually denoted 1 and 0, whereas in elementary algebra the values of the variables are numbers.

  6. List of mathematical logic topics - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_logic...

    This is a list of mathematical logic topics. ... Definable real number; Algebraic logic. Boolean algebra (logic) Dialectica space; categorical logic; Model theory.

  7. Axiom - Wikipedia

    en.wikipedia.org/wiki/Axiom

    An axiom, postulate, or assumption is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments. The word comes from the Ancient Greek word ἀξίωμα (axíōma), meaning 'that which is thought worthy or fit' or 'that which commends itself as evident'.

  8. Algebraic theory - Wikipedia

    en.wikipedia.org/wiki/Algebraic_theory

    An algebraic theory consists of a collection of n-ary functional terms with additional rules (axioms).. For example, the theory of groups is an algebraic theory because it has three functional terms: a binary operation a × b, a nullary operation 1 (neutral element), and a unary operation x ↦ x −1 with the rules of associativity, neutrality and inverses respectively.

  9. Mathematical logic - Wikipedia

    en.wikipedia.org/wiki/Mathematical_logic

    Mathematical logic is the study of formal logic within mathematics. Major subareas include model theory, proof theory, set theory, and recursion theory (also known as computability theory). Research in mathematical logic commonly addresses the mathematical properties of formal systems of logic such as their expressive or deductive power.

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