by Guest » Sun Apr 29, 2018 12:19 pm
Hello. I have recently seen on some site what the equals sign is an operator too, for example as the plus sign. And I know that = is an operator in programming, but I'm interested only in the mathematical definition of this sign. Generally, operators are formally any map from a set to a set. And If we map a set into itself, don't we use the equals sign? I mean: [tex]1 = 1, 2 = 2, (y+2)/(y+2) = 1[/tex], etc.