logical variables - ορισμός. Τι είναι το logical variables
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Τι (ποιος) είναι logical variables - ορισμός

Logical graphs; Logical Graph

logical positivism         
ASSERTION THAT ONLY STATEMENTS VERIFIABLE THROUGH EMPIRICAL OBSERVATION ARE MEANINGFUL
Logical empiricism; Logical positivists; Logical Positivist; Logical Positivism; Neopositivism; Neo-positivism; Logical positivist; Logical empiricist; Logical Empiricism; Vienna positivism; Protocol statement; Basic statement; Observational statement
(also logical empiricism)
¦ noun a form of positivism which considers that the only meaningful philosophical problems are those which can be solved by logical analysis.
Logical positivism         
ASSERTION THAT ONLY STATEMENTS VERIFIABLE THROUGH EMPIRICAL OBSERVATION ARE MEANINGFUL
Logical empiricism; Logical positivists; Logical Positivist; Logical Positivism; Neopositivism; Neo-positivism; Logical positivist; Logical empiricist; Logical Empiricism; Vienna positivism; Protocol statement; Basic statement; Observational statement
Logical positivism, later called logical empiricism, and both of which together are also known as neopositivism, was a movement in Western philosophy whose central thesis was the verification principle (also known as the verifiability criterion of meaning). This theory of knowledge asserted that only statements verifiable through direct observation or logical proof are meaningful in terms of conveying truth value, information or factual content.
free variable         
  • Tree summarizing the syntax of the expression <math>\forall x\, ((\exists y\, A(x)) \vee B(z)) </math>
CLASSIFICATION OF VARIABLES IN A LOGIC FORMULA BASED ON WHETHER OR NOT THEY ARE INSIDE THE SCOPE OF A QUANTIFIER
Free variable; Bound variable; Variable binding operation; Variable-binding operation; Free variables; Bound variables; Unbound variable; Unbound variables; Variable-binding operator; Variable binding operator; Free and bound variables; Bound variable clash; Free and bound variable; Placeholder (computer programming); Free variables & bound variables; Free occurrence; Placeholder variable; Apparent variable
1. A variable referred to in a function, which is not an argument of the function. In lambda-calculus, x is a {bound variable} in the term M = x . T, and a free variable of T. We say x is bound in M and free in T. If T contains a subterm x . U then x is rebound in this term. This nested, inner binding of x is said to "shadow" the outer binding. Occurrences of x in U are free occurrences of the new x. Variables bound at the top level of a program are technically free variables within the terms to which they are bound but are often treated specially because they can be compiled as fixed addresses. Similarly, an identifier bound to a recursive function is also technically a free variable within its own body but is treated specially. A closed term is one containing no free variables. See also closure, lambda lifting, scope. 2. In logic, a variable which is not quantified (see quantifier).

Βικιπαίδεια

Logical graph

A logical graph is a special type of diagrammatic structure in any one of several systems of graphical syntax that Charles Sanders Peirce developed for logic.

In his papers on qualitative logic, entitative graphs, and existential graphs, Peirce developed several versions of a graphical formalism, or a graph-theoretic formal language, designed to be interpreted for logic.

In the century since Peirce initiated this line of development, a variety of formal systems have branched out from what is abstractly the same formal base of graph-theoretic structures.