approximate calculation
121nuclear fission — fission (def. 2). [1885 90] * * * Division of a heavy atomic nucleus into two fragments of roughly equal mass, accompanied by the release of a large amount of energy, the binding energy of the subatomic particles. The energy released in the… …
122estimate — I (New American Roget s College Thesaurus) v. t. consider, gauge, judge; value, appraise, evaluate, rate, assess, measure; compute, reckon, calculate. n. judgment, opinion, appraisal, report, criticism; calculation. II (Roget s IV) n. 1. [An… …
123New moon — For other uses, see New moon (disambiguation). The new moon phase In astronomical terminology, the new moon is the lunar phase that occurs when the Moon, in its monthly orbital motion around Earth, lies between Earth and the Sun, and is therefore …
124Monte Carlo method — Not to be confused with Monte Carlo algorithm. Computational physics …
125Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …
126Interval arithmetic — Interval arithmetic, also called interval mathematics , interval analysis , and interval computation , is a method in mathematics. It has been developed by mathematicians since the 1950s and 1960s as an approach to putting bounds on rounding… …
127Spectrum (functional analysis) — In functional analysis, the concept of the spectrum of a bounded operator is a generalisation of the concept of eigenvalues for matrices. Specifically, a complex number λ is said to be in the spectrum of a bounded linear operator T if… …
128Criticisms of socialism — Economics …
