inverted delta nabla

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• Delta — commonly refers to: Delta (letter), Δ or δ in the Greek alphabet, also used as a mathematical symbol River delta, a landform at the mouth of a river Delta Air Lines, a major U.S. airline Delta may also refer to: Contents 1 Places …   Wikipedia

• nabla — del del n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; also called the {gradient} or… …   The Collaborative International Dictionary of English

• Nabla symbol — For other uses, see Nabla. ∇ The nabla symbol The harp, the instrument after which the nabla symbol is named Nabla is the symbol (∇) …   Wikipedia

• nabla — ˈnablə noun ( s) Etymology: Greek, of Semitic origin; akin to Hebrew nēbhel harp 1. : an ancient stringed instrument probably like a Hebrew harp of 10 or 12 strings called also nebel 2. [probably so called from the resemblance of its symbol, the… …   Useful english dictionary

• del — n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; also called the {gradient} or {grad}. It is …   The Collaborative International Dictionary of English

• grad — del del n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; also called the {gradient} or… …   The Collaborative International Dictionary of English

• gradient — del del n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; also called the {gradient} or… …   The Collaborative International Dictionary of English

• Hooke's law — models the properties of springs for small changes in length Prof. Walter Lewin explains Hooke s law, in …   Wikipedia

• Curvilinear coordinates — Curvilinear, affine, and Cartesian coordinates in two dimensional space Curvilinear coordinates are a coordinate system for Euclidean space in which the coordinate lines may be curved. These coordinates may be derived from a set of Cartesian… …   Wikipedia

• Distortion free energy density — The Distortion free energy density is a quantity that describes the distortion of a liquid crystal from its preferred state in which all of the liquid crystal molecules are aligned parallel to one common axis. It also commonly goes by the name… …   Wikipedia

• Newton's method in optimization — A comparison of gradient descent (green) and Newton s method (red) for minimizing a function (with small step sizes). Newton s method uses curvature information to take a more direct route. In mathematics, Newton s method is an iterative method… …   Wikipedia