Under Â§ 1505, however, a defendant can be convicted of obstruction of justice by obstructing a pending proceeding before Congress or a federal agency. A pending proceeding could include an informal investigation by an executive agency.
Piecewise is actually a way of expressing the function, rather than a characteristic of the function itself, but with additional qualification, it can describe the nature of the function.
piece - an item that is an instance of some type; he designed a new piece of equipment; she bought a lovely piece of china; item - a whole individual unit; especially when included in a list or collection; they reduced the price on many items 3.