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LucasBrown (talk | contribs) Changing short description from "The reals with an extra square root of +1 adjoined" to "Reals with an extra square root of +1 adjoined" |
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x + yj &\mapsto (x - y, x + y)
\end{align}</math>
is an [[quadratic space#isometry|isometry]] of [[Quadratic_form#Quadratic_space|quadratic spaces]].
Split-complex numbers have many other names; see ''{{section link||Synonyms}}'' below. See the article ''[[Motor variable]]'' for functions of a split-complex number.
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