<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2015) (Learn how and when to remove this template message) </Td> </Tr> <P> In mathematics, equality is a relationship between two quantities or, more generally two mathematical expressions, asserting that the quantities have the same value, or that the expressions represent the same mathematical object . The equality between A and B is written A = B, and pronounced A equals B . The symbol "=" is called an "equals sign". Thus there are three kinds of equality, which are formalized in different ways . </P> <Ul> <Li> Two symbols refer to the same object . </Li> <Li> Two sets have the same elements . </Li> <Li> Two expressions evaluate to the same value, such as a number, vector, function or set . </Li> </Ul> <Li> Two symbols refer to the same object . </Li>

When should you use a symbol that allows equality
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