Limit superior, also known as the supremum limit or upper limit, is a concept in calculus and mathematical analysis that denotes the largest accumulation point of a sequence. There are several synonyms for this term that are commonly used in mathematical literature. These include the upper bound, the least upper bound, the highest limit, and the top limit. These synonyms all refer to the same idea, which is that the limit superior of a sequence is the highest value that a subsequence can accumulate towards. This concept is used extensively in analysis, probability theory, and other branches of mathematics.