Lebesgue measure is a mathematical concept that extends the notion of length, area, and volume to more complex sets, particularly those that may be 'fractal' in nature. It provides a way to assign a consistent measure to subsets of Euclidean space, allowing for the analysis of sets that cannot be easily measured with traditional methods. This concept is crucial for understanding the properties of fractal sets, the framework of multifractals, and how measures can be constructed in fractal geometry.
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