Theta notation is a mathematical notation used to describe the asymptotic tight bound of a function, specifically characterizing its growth rate in relation to input size. It provides a way to express that a function grows at the same rate as a given benchmark function, which is particularly useful in analyzing the efficiency of algorithms. Understanding theta notation helps identify the worst-case and best-case performance of recursive algorithms, solve recurrence relations, and analyze divide-and-conquer recurrences.
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