**Visualizing Linear Functionals**

In finite dimensions, a linear functional can be visualized in terms of its level sets. In three dimensions, the level sets of a linear functional are a family of mutually parallel planes; in higher dimensions, they are parallel hyperplanes. This method of visualizing linear functionals is sometimes introduced in general relativity texts, such as Gravitation by Misner, Thorne & Wheeler (1973).

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### Other articles related to "linear":

Gyrator

... A gyrator is a passive,

... A gyrator is a passive,

**linear**, lossless, two-port electrical network element proposed in 1948 by Bernard D ... Tellegen as a hypothetical fifth**linear**element after the resistor, capacitor, inductor and ideal transformer ... Although the gyrator was conceived as a fifth**linear**element, its adoption makes both the ideal transformer and either the capacitor or inductor ...Main Site Subjects

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