What is an overline in typography? - Graphic Design Stack Exchange An overline, overscore, or overbar, is a typographical feature of a horizontal line drawn immediately above the text In mathematical notation, an overline has been used for a long time as a vinculum, a way of showing that certain symbols belong together
notation - What does . 9 with a line above the 9 mean? - Mathematics . . . 14 As other answers have said, it stands for a repeating decimal, where the digits under the line are repeated $$0 \overline {9} = 0 9999999\ldots$$ But if you want to be a little pedantic, you might prefer to say that both $0 \overline {9}$ and $0 9999999\ldots$ are two different forms of notation for the same number
online resources - Simplify Boolean Expression $A\cdot \overline {B . . . You'll need to complete a few actions and gain 15 reputation points before being able to upvote Upvoting indicates when questions and answers are useful What's reputation and how do I get it? Instead, you can save this post to reference later