Weak Mathematical Induction
Weak induction proves a statement for natural numbers by assuming it's true…
Weak Excluded Middle in Intuitionistic Logic
The weak excluded middle asserts that for any proposition P, either P…
Weak Counterexample in Intuitionistic Logic
A weak counterexample in intuitionistic logic signifies a lack of positive evidence…
Variable Assignment in Formal Logic
A variable assignment, sometimes called a variable assignment function, is a crucial…
Vacuous Quantifier
A vacuous quantifier is a logical operator that does not bind any…
Upward Löwenheim–Skolem Theorem
The upward Löwenheim–Skolem theorem states that if a first-order theory has an…
Universe of Discourse
The universe of discourse defines the scope of elements relevant to a…
Universal Quantifier (∀)
The universal quantifier (∀) in predicate logic signifies that a statement is…
Universal Introduction Rule in Predicate Logic
The universal introduction rule in predicate logic allows inferring a general statement…
Unary Function: Understanding Single-Argument Operations
A unary function takes a single input. It's fundamental in math and…