anisotropic homogeneous cosmological model
model-e keyhânšenâxti-ye hamgen o nâ-izogard
Fr.: modèle cosmiologique homogène mais anisotrope
A solution to Einstein's theory of → general relativity that is spatially homogeneous but allows for rotation and/or shear. See also → Bianchi cosmological model.
→ anisotropic; → homogeneous; → cosmological; → model.
1) Of uniform composition or having a common property throughout.
Homogeneous, from M.L. homogeneus, from Gk. homogenes "of the same kind," from homos "same," → homo-, + genos "race, kind," gonos "birth, offspring," from PIE base *gen-/*gon-/*gn- "to produce, beget, be born," cf. Av. zan- "to bear, give birth to a child, be born," infinitive zazāite, zāta- "born," zana- "race" (in sruuô.zana- "belonging to the race of the horned ones"), O.Pers. zana- "tribe" (in paru-zana- "consisting of many tribes"), Skt. janati "begets, bears," jana- "creature, human being, race, tribe, people;" L. genus "race, stock, kind," gignere "to beget."
Hamgen "of the same kind, like each other; friend, partner," from ham-, → homo-, + gen "kind," O.Pers./Av. zana- "race; tribe," cognate with L. genus, as above). Alternatively, gen may be a variant of Mid./Mod.Pers. gôn/gun "kind, type; manner; color, skin color," from Av. gaona- "hair, hair color, color."
šârre-ye hamgen (#)
Fr.: fluide homogène
A fluid with uniform properties throughout, but meteorologists sometimes designate as homogeneous a fluid with constant density.
→ homogeneous, → fluid.
homogeneous linear differential equation
hamugeš-e degarsâne-yi-ye xatti hamgen
Fr.: équation différentielle linéaire homogène
A → linear differential equation if the right-hand member is zero, Q(x) = 0, on interval I.
→ homogeneous; → linear; → differential; → equation.
âšubnâki-ye hamgen (#)
Fr.: turbulence homogène
→ Turbulence in which spatial derivatives of all mean turbulent quantities are negligible.
→ homogeneous, → turbulence.
giti-ye hamgen (#)
Fr.: Univers homogène
A model Universe which is homogeneous and → isotropic on large scales. It is modeled by a → Robertson-Walker cosmology. A homogeneous Universe is filled with a constant density and negligible pressure. Any small spatial region is characteristic for the whole Universe.
→ homogeneous; → Universe.
Lack of homogeneity; something that is not → homogeneous.
→ in- "not" + → homogeneous.
Fr.: non homogène
Not homogeneous. → nonhomogeneous linear differential equation.
→ non-; → homogeneous.
nonhomogeneous linear differential equation
hamugeš-e degarsâne-yi-ye xatti nâhamgen
Fr.: équation différentielle linéaire non homogène
A → linear differential equation if Q(x)≠ 0 on interval I.
→ nonhomogeneous; → linear; → differential; → equation.