postgres=# \do+ ^
                                              List of operators
   Schema   | Name |  Left arg type   |  Right arg type  |   Result type    |   Function    |  Description
------------+------+------------------+------------------+------------------+---------------+----------------
 pg_catalog | ^    | double precision | double precision | double precision | dpow          | exponentiation
 pg_catalog | ^    | numeric          | numeric          | numeric          | numeric_power | exponentiation
(2 rows)

postgres=# \df+ power
                                                                         List of functions
   Schema   | Name  | Result data type |        Argument data types         |  Type  | Security | Volatility |  Owner   | Language |  Source code  |  Description
------------+-------+------------------+------------------------------------+--------+----------+------------+----------+----------+---------------+----------------
 pg_catalog | power | double precision | double precision, double precision | normal | invoker  | immutable  | postgres | internal | dpow          | exponentiation
 pg_catalog | power | numeric          | numeric, numeric                   | normal | invoker  | immutable  | postgres | internal | numeric_power | exponentiation
(2 rows)