empty set

Scientific  

/ ĕmp′tē /

1. Mathematics The set that has no members or elements.

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Example Sentences

Some are empty, set up at the crack of dawn and then abandoned for hours on end, until the owners actually want to use them.

From BBC

Other examples are the axiom of the empty set, which states that a set without elements exists, and the axiom of pairing, according to which two sets with the same elements are equal.

From Scientific American

After all, work in this field is based on a few basic assumptions that are as simple as possible—such as that there is an empty set—from which results as complicated as Gödel's incompleteness theorems can be inferred.

From Scientific American

Meanwhile the camera panned to an empty set.

From BBC

After being relatively balanced early in the year, they’ve done it almost exclusively through the air, particularly when Roethlisberger goes to an empty set that features four wide receivers and tight end Eric Ebron.

From Seattle Times