Branch links a mathematical concept to the field of mathematics that studies it. Wikipedia describes set theory as "the branch of mathematical logic that studies sets," a single sentence that both names the concept's field and its parent discipline. This dimension groups concepts that belong to the same branch of mathematics.
Branch
Sources
Wikipedia: Axiom
Wikimedia FoundationContains: Axiom, lead paragraph, opening definitionQuote, Contains: Axiom, lead paragraph, opening definition
An axiom, postulate, or assumption, is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments.
Wikipedia: Cantor's Diagonal Argument
Wikimedia FoundationContains: Cantor's Diagonal Argument, lead paragraph, opening definitionQuote, Contains: Cantor's Diagonal Argument, lead paragraph, opening definition
Cantor's diagonal argument (among various similar names) is a mathematical proof that there are infinite sets which cannot be put into one-to-one correspondence with the infinite set of natural numbers
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