Normal Elements
The notion of normal operators generalizes to an involutive algebra; namely, an element x of an involutive algebra is said to be normal if . The most important case is when such an algebra is a C*-algebra. A positive element is an example of a normal element.
Read more about this topic: Normal Operator
Famous quotes containing the words normal and/or elements:
“Nothing is poetical if plain daylight is not poetical; and no monster should amaze us if the normal man does not amaze.”
—Gilbert Keith Chesterton (1874–1936)
“The poem has a social effect of some kind whether or not the poet wills it to have. It has kinetic force, it sets in motion ... [ellipsis in source] elements in the reader that would otherwise be stagnant.”
—Denise Levertov (b. 1923)