The active form of int returns the evaluated integral.
The inert form (Int) returns the unevaluated integral.
Use value to evaluate the integral when desired.
Some frequently used inert representations:
In this example an evaluation rule is defined for even when there exists no corresponding active function
The value command understands any function whose name starts with the character as being an inert function
The same inert representation mechanism works with any Maple function or procedure
Any differentiation, expansion or printing rule defined using the extension mechanism (e.g routines `diff/F`) are automatically taken into account by the system
With package commands, the mapping from inert to active is performed taking into account the last package loaded at the time of performing the operation. For instance, a Transpose command exists in different packages with different meanings; in this example LinearAlgebra is the last package loaded, so that LinearAlgebra:-Transpose is the active form of the inert %Transpose
The inert representation also works with indexed functions, for instance as those used in the Physics package