👉 Principes, in mathematics and logic, are formal rules or axioms that guide a system towards a particular conclusion. They are used to prove statements or derive conclusions from other statements. A principle is typically stated as "if P then Q" or "if P then not Q". In mathematical logic, principles can be represented as logical connectives such as AND, OR, NOT, and implication (IF-THEN). These rules define the structure of a deductive system for proving mathematical truths.