The prefix ultra- means ‘beyond, on the farther side’. It became common at the beginning of the 19th century, probably adopted from French, where it was used for political designations. It is also in French that the first uses of the prefix enter mathematics.

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  • Holger Becker

摘要

The prefix ultra- means ‘beyond, on the farther side’. It became common at the beginning of the 19th century, probably adopted from French, where it was used for political designations. It is also in French that the first uses of the prefix enter mathematics.