system of simultaneous equations
11Statically indeterminate — In statics, a structure is statically indeterminate when the static equilibrium equations are not sufficient for determining the internal forces and reactions on that structure.Based on Newton s laws of motion, the equilibrium equations available …
12Covariance and contravariance of vectors — For other uses of covariant or contravariant , see covariance and contravariance. In multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometric or physical entities… …
13Léon Walras — Lausanne school Léon Walras Born December 16, 1834(1834 12 16) Évreux, Upper Normandy …
14Diophantine equation — In mathematics, a Diophantine equation is an indeterminate polynomial equation that allows the variables to be integers only. Diophantine problems have fewer equations than unknown variables and involve finding integers that work correctly for… …
15linear equation — Math. 1. a first order equation involving two variables: its graph is a straight line in the Cartesian coordinate system. 2. any equation such that the sum of two solutions is a solution, and a constant multiple of a solution is a solution. Cf.… …
16Nodal analysis — Kirchhoff s current law is the basis of nodal analysis. In electric circuits analysis, nodal analysis, node voltage analysis, or the branch current method is a method of determining the voltage (potential difference) between nodes (points where… …
17Structural equation modeling — (SEM) is a statistical technique for testing and estimating causal relations using a combination of statistical data and qualitative causal assumptions. This definition of SEM was articulated by the geneticist Sewall Wright (1921),[1] the… …
18Independent equation — An independent equation is an equation in a system of simultaneous equations which cannot be derived algebraically from the other equations.ee also*Linear algebra *Indeterminate systemReferences …
19Mass attenuation coefficient — The mass attenuation coefficient is a measurement of how strongly a chemical species or substance absorbs or scatters light at a given wavelength, per unit mass. In addition to visible light, mass attenuation coefficients can be defined for other …
20troff — This article is about the Unix document processing system. For the command in BASIC, see TROFF. Not to be confused with Trough (disambiguation). troff is a document processing system developed by AT T for the Unix operating system. Contents 1… …
