Who invented the multiplication symbol?

Answer 1

The multiplication symbol (×) was popularized by the mathematician William Oughtred in the 17th century, specifically in his work "Clavis Mathematicae" published in 1631. However, its origins can be traced back to earlier works, with some evidence suggesting that the symbol was used by the mathematician Christophorus Clavius in the late 16th century. The use of the symbol became more widespread over time, solidifying its place in mathematical notation.