# Epsilon-Delta Definition of Limit

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One of the key concepts of calculus is the limit of a function. Informally, a function has a limit at a point if the value gets close to a fixed number as gets close to . This Demonstration illustrates a more formal definition of limit, usually referred to as the - definition. The arrangement of the sliders highlights the importance of the wording of the definition.

Contributed by: Ferenc Beleznay&nb