Function: type/Open - checks for the Open property

Calling Sequence:

type(n, Open);

Parameters:

n - any algebraic expression

Description:

The call type(n, Open) checks whether n is a `call` to the Open property , i.e. whether n is of type function and op(n, 'Open'); if so, it returns true, and false otherwise.

This type is part of the `math` package and automatically initialized when this package is loaded.

Examples:

> with(math):

> type(Open(2), Open);

[Maple Math]

> type(-1, Open);

[Maple Math]

See Also:

type , type/range , type/RealRange .

Version History:

Version 1.0 as of December 30, 1997