approximate density

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• Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …   Wikipedia

• approximate — 1. adjective /əˈprɒk.sɪ.mət,ʌˈpɹɑks.ə.mɪt,əˈprɒk.sɪm.eɪt,ʌˈpɹɑks.ə.maɪt/ a) Approaching; proximate; nearly resembling. Approximate results or values. b) Near correctness; nearly exact; not perfectly …   Wiktionary

• Orders of magnitude (density) — Skylab measured several orders of magnitude of the Sun s density (top scale: 10−18 to 10−6 g⋅cm−3, equivalent to 10−15 to 10−3 kg⋅m−3) at different temperatures and heights above its surface. List of orders of magnitude for density less than …   Wikipedia

• Lebesgue's density theorem — In mathematics, Lebesgue s density theorem states that for any Lebesgue measurable set A, the density of A is 1 at almost every point in A. Intuitively, this means that the edge of A, the set of points in A whose neighborhood is partially in A… …   Wikipedia

• List of displays by pixel density — This is an incomplete list, which may never be able to satisfy particular standards for completeness. You can help by expanding it with reliably sourced entries. This is a list of selected devices’ displayed pixel density in pixels per inch (PPI) …   Wikipedia

• Energy density — For energy density in the sense of energy per unit mass, see specific energy. For energy density of foods, see specific energy. Energy density is a term used for the amount of energy stored in a given system or region of space per unit volume.… …   Wikipedia

• Current density — This page is about the electric current density in electromagnetism. For the probability current density in quantum mechanics, see Probability current. Current density is a measure of the density of flow of a conserved charge. Usually the charge… …   Wikipedia

• Kernel density estimation — of 100 normally distributed random numbers using different smoothing bandwidths. In statistics, kernel density estimation is a non parametric way of estimating the probability density function of a random variable. Kernel density estimation is a… …   Wikipedia

• Referential Density — is a concept of ficto narrative theory put forward by Thomas G. Pavel in his 1986 book, Fictional Worlds . [Pavel, Thomas G. Fictional Worlds . Cambridge: Harvard UP, 1986. ISBN 0674299663] The concept refers to the referential relationship of a… …   Wikipedia

• Low-density parity-check code — In information theory, a low density parity check code (LDPC code) is an error correcting code, a method of transmitting a message over a noisy transmission channel. [David J.C. MacKay (2003) Information theory, inference and learning algorithms …   Wikipedia

• Jacobson density theorem — In mathematics, the Jacobson density theorem in ring theory is an important generalization of the Artin Wedderburn theorem. It is named for Nathan Jacobson.It states that given any irreducible module M for a ring R , R is dense in its bicommutant …   Wikipedia