closed basté (#) Fr.: fermé Having boundaries; limited. → closed curve; → closed Universe. Closed, p.p. of close, from M.E. clos, from O.Fr., from clore "to shut," from L. clausus, p.p. of claudere "to close." Basté p.p.of bastan, from Mid.Pers. bastan/vastan "to bind, shut," Av./O.Pers. band- "to bind, fetter," banda- "band, tie," Skt. bandh- "to bind, tie, fasten," PIE *bhendh- "to bind," cf. Ger. binden, E. bind, → band. |
closed curve xam-e basté (#) Fr.: courbe fermée A curve whose ends are joined. |
closed space fazâ-ye basté (#) Fr.: espace fermé A bounded space the surface of which has the property that if one travels in any direction upon it without changing direction, one will end up back to the departure point. An example is a sphere. Triangles which lie on the surface of a closed space will have a sum of angles which is greater than 180°. An closed space has a positive → curvature. See also → closed Universe, → open space. |
closed system râžmân-e basté Fr.: système fermé Thermodynamics: A system which can exchange energy with the surroundings but not matter. → open system; → isolated system. |
closed Universe giti-ye basté (#) Fr.: Univers fermé A → cosmological model, first formulated by Friedmann and Lemaître, in which the Universe has a → finite size and lifetime and → space has a → positive → curvature, e.g. a Universe with a density greater than the → critical density. See also → closed space. |
closed wff wff basté Fr.: FBF fermée In → predicate logic, a → wff with no → free occurrences of any → variable. Also called a → sentence. |
quasi-closed subsystem zir-râžmân-e cunân-basté Fr.: sous-système quasi-fermé A subsystem if its intrinsic energy is large, on the average, with respect to the energy of its interaction with other portions of the → closed system. |