The set is assigned the classification if it is definable by a formula.

Someone comes by to assess your bill by a mysterious formula that you will never decipher.

If Mancini sticks by an attacking formula this will be the most open game you'll see this season.

Non-standard numbers are precisely those that cannot be uniquely specified (due to limitations of time and space) by an internal formula.

He had never understood this willingness to suspend thinking and judgment, to live by a formula.

The amount is either a set figure or determined by a formula.

The computer assigns a number by a formula that takes population density into account.

The two use a bottom-up strategy, buying only those stocks that are high yielding by a complex formula.

A set of natural numbers is assigned the classification if it is definable by a formula.

Such a scheme states that any set of natural numbers definable by a formula of a given complexity exists.