Definition:Supremum/Also known as

Definition
Particularly in the field of analysis, the supremum of a set $T$ is often referred to as the least upper bound of $T$ and denoted $\operatorname{lub} \left({T}\right)$ or $\operatorname{l.u.b.} \left({T}\right)$.

Some sources refer to the supremum of a set as the supremum on a set.