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In linear algebra, a power cone is a kind of a convex cone that is particularly important in modeling convex optimization problems. [1] [2] It is a generalization of the quadratic cone: the quadratic cone is defined using a quadratic equation (with the power 2), whereas a power cone can be defined using any power, not necessarily 2.
Aventurine is often banded and an overabundance of fuchsite may render it opaque, in which case it may be mistaken for malachite at first glance. [citation needed] The name aventurine derives from the Italian "a ventura" meaning "by chance". This is an allusion to the lucky discovery of aventurine glass or goldstone at
Light cone coordinates can also be generalized to curved spacetime in general relativity. Sometimes calculations simplify using light cone coordinates. See Newman–Penrose formalism. Light cone coordinates are sometimes used to describe relativistic collisions, especially if the relative velocity is very close to the speed of light.
Taking as event p a flash of light (light pulse) at time t 0, all events that can be reached by this pulse from p form the future light cone of p, while those events that can send a light pulse to p form the past light cone of p. Given an event E, the light cone classifies all events in spacetime into 5 distinct categories:
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There are two sources for the text Gardner used to make this chant. The opening lines, with their repeated Eko eko refrain, apparently come from an article published in a 1921 edition of the journal Form [5] by J. F. C. Fuller, on "The Black Arts", reprinted in The Occult Review in April 1926, though "The Occult Review" 1923 is frequently mis-cited.
The Charge of the Goddess (or Charge of the Star Goddess) is an inspirational text often used in the neopagan religion of Wicca.The Charge of the Goddess is recited during most rituals in which the Wiccan priest/priestess is expected to represent, and/or embody, the Goddess within the sacred circle, and is often spoken by the High Priest/Priestess after the ritual of Drawing Down the Moon.