
Augustus De Morgan
Augustus De Morgan was a 19th-century mathematician and logician known for his foundational work in formal logic. He formulated De Morgan's Laws, which describe how logical operations relate to each other, particularly regarding negation, conjunction, and disjunction. These laws help clarify how to express complex logical statements. For example, they show that the negation of a conjunction is equivalent to the disjunction of the negations. De Morgan's contributions laid the groundwork for modern symbolic logic, influencing how we understand mathematical reasoning and logical expressions, including propositional and predicate logic.