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<p>scalar may also have other roles in terms of vector components, in normed vector spaces, in modules, and in transformations.A quantity described by multiple scalars, such as having both direction and magnitude, is called a <a href="page.php?w=vector_%28mathematics_and_physics%29">vector</a>.The term scalar is also sometimes used informally to mean a vector, <a href="page.php?w=Matrix_%28mathematics%29">matrix</a>, <a href="page.php?w=tensor">tensor</a>, or other, usually, "compound" value that is actually reduced to a single component. Thus,</p><p>
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