Tag Archive for: set theory

micro3

Why Mathematics Defines Numbers and Functions as Sets

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Direct answer: Standard mathematics defines numbers, functions, and other objects as sets because the 19th-century collapse of certainty in Euclidean geometry…
cardinalnumbers

Cardinal and Ordinal Numbers: An Informal Introduction

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Cardinal numbers measure the size of a set, including infinite sets, while ordinal numbers describe the structure of a well-ordered set. Every set can…
micro1

Well-Formed Formulas in Set Theory: WFFs Explained Clearly

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What Is a Well-Formed Formula in Set Theory? A well-formed formula (wff) in set theory is a string of symbols built strictly from the alphabet of set…