A jump discontinuity occurs in a function when there is a sudden 'jump' in the value of the function at a certain point, meaning the left-hand limit and right-hand limit at that point do not match. This type of discontinuity signifies that the function cannot be continuous at that point, as the value of the function does not settle into a single output. Jump discontinuities are crucial for understanding how functions behave in terms of integrability, continuity properties, and how they can be classified in mathematical analysis.
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