Plane wave expansion method — (PWE) refers to a computational technique in Electromagnetics,solve the Maxwell s equations by formulating an Eigenvalue problem out of it. This method isa popular among Photonic Crystal community, as a method of solving for the band structure… … Wikipedia
Conjugate focal plane — In optics, a conjugate focal plane of a given plane, P, is a plane P′ such that points on P are imaged at P′.[1] In a telescope, the subject focal plane is at infinity and the conjugate image plane, at which the image sensor is placed, is said to … Wikipedia
Conjugate diameters — Two conjugate diameters of an ellipse. Each edge of the bounding parallelogram is parallel to one of the diameters. In geometry, two diameters of a conic section are said to be conjugate if each chord parallel to one diameter is bisected by the… … Wikipedia
conjugate axis — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… … The Collaborative International Dictionary of English
conjugate diameter — noun 1. : conjugata 2. a. : one of two diameters of a central conic section each of which bisects all chords parallel to the other b. : one of three diameters of a central quadric having as its conjugate diametral plane the plane of the other two … Useful english dictionary
Conjugate diameters — Diameter Di*am e*ter, n. [F. diam[ e]tre, L. diametros, fr. Gr. ?; dia through + ? measure. See {Meter}.] 1. (Geom.) (a) Any right line passing through the center of a figure or body, as a circle, conic section, sphere, cube, etc., and terminated … The Collaborative International Dictionary of English
Complex conjugate — Geometric representation of z and its conjugate in the complex plane In mathematics, complex conjugates are a pair of complex numbers, both having the same real part, but with imaginary parts of equal magni … Wikipedia
Cubic plane curve — A selection of cubic curves. See information page for details. Cubic curve redirects here. For information on polynomial functions of degree 3, see Cubic function. In mathematics, a cubic plane curve is a plane algebraic curve C defined by a… … Wikipedia
Nonlinear conjugate gradient method — In numerical optimization, the nonlinear conjugate gradient method generalizes the conjugate gradient method to nonlinear optimization. For a quadratic function : The minimum of f is obtained when the gradient is 0: . Whereas linear conjugate… … Wikipedia
Complex plane — Geometric representation of z and its conjugate in the complex plane. The distance along the light blue line from the origin to the point z is the modulus or absolute value of z. The angle φ is the argument of z. In mathematics … Wikipedia