What is an ellipse? What about ellipses?
See the explanations below for Writing ellipses or a Math ellipse:
Writing ellipses: (from the APA Style Blog)
Ellipses are three dots in the middle of a sentence. Their purpose is to let the reader know that some part of a quotation has been left out.
If text is omitted from the middle of a sentence, it is indicated with three ellipses.
Original: He came home, with dogs and parakeet in tow, just in time for supper.
With text omitted: He came home . . . just in time for supper.
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