# ~ -- a unary postfix operator

## Ways to use symbol ~ :

• "Module ~" -- see sheaf(Module) -- make a coherent sheaf
• "Ring ~" -- see sheaf(Ring) -- make a coherent sheaf of rings
• String ~ (missing documentation)
• String ~ = Thing (missing documentation)

## For the programmer

The object ~ is .

This operator may be used as a postfix unary operator in an expression like x~. The user may install a method for handling such expressions with code such as

         X ~   := (x) -> ...

where X is the class of x.