👉 In mathematics, "sup" is a mathematical operator that stands for "sub." It's used to denote the lower limit of an arithmetic sequence or series. For example, in the arithmetic sequence 3, 6, 9, ..., the first term is 3, and the common difference between each term is 3. Therefore, the upper limit of this sequence would be 10 (since there are a total of 5 terms). The term "sup" represents the lower limit