👉 Lacunary, in mathematics and computer science, is a type of sequence where there are infinitely many terms. It can be defined as a sequence that has an infinite number of subsequences (or sub-sequences) but no infinite subsequence itself. In other words, it's like having an infinite number of gaps between the terms in a sequence. For example: - The sequence 1/2, 3/4, 5/6, 7/8 is lacun