imaginary unit

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|number theory|complex analysis|quaternion theory}} An [[imaginary number]] (in the case of [[complex number]]s, usually denoted <math>i</math>) that is defined as a [[solution]] to the [[equation]] <math>x^2 = -1</math>.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.