New posts in definition

Definition of General Associativity for binary operations

What happens if we remove the requirement that $\langle R, + \rangle$ is abelian from the definition of a ring?

What is a point?

What is combinatorics?

What is the difference between a heuristic and an algorithm?

What, if anything, is the sum of all complex numbers?

How to define a Weil divisor from a Cartier divisor on a variety?

If the gambler's fallacy is false, how do notions of "expected number" of events work?

Is this alternative notion of continuity in metric spaces weaker than, or equivalent to the usual one?

Vector Spaces: Redundant Axiom?

What is a real number (also rational, decimal, integer, natural, cardinal, ordinal...)?

Definition of the nth derivative? [First post]

Left Hand Derivative Definition

What is the intuitive meaning of the adjugate matrix?

How can we think and/or write rigorously about integration by substitution?

The difference between hermitian, symmetric and self adjoint operators.

What is the Direction of a Zero (Null) Vector?

No difference between $0/0$ and $0^0$?

What's the difference between "relation", "mapping", and "function"?

How do you read the definitions of range and domain of a relation aloud?