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.
A piecewise function is a function that is defined on a sequence of intervals. Piecewise functions are implemented in the Wolfram Language as Piecewise[val1, cond1, val2, cond2, ...]. Additional piecewise functions include the Heaviside step function, rectangle function, and triangle function. Semicolons and commas are sometimes used at the end of either the left or the right column, with particular usage apparently depending on the author.