1) number theory. The Columbia Encyclopedia, Sixth Edition. 2001 ...Integers that have other divisors are called composite; examples are 4, 6, 8, 9, 10, 12, . The fundamental theorem of arithmetic, the unique factorization theorem,... 2) transfinite number. The Columbia Encyclopedia, Sixth Edition. 2001 ...This set can be put in a one-to-one correspondence with many other infinite sets, e.g., the set of all negative integers {-1, -2, -3, -n, }, the set of all even positive... 3) number. The Columbia Encyclopedia, Sixth Edition. 2001 ...The Natural NumbersCardinal numbers describe the size of a collection of objects; two such collections have the same (cardinal) number of objects if their members... 4) mass number. The Columbia Encyclopedia, Sixth Edition. 2001 ...All atoms of a chemical element have the same atomic number (number of protons in the nucleus) but may have different mass numbers (from having different numbers... 5) octane number. The Columbia Encyclopedia, Sixth Edition. 2001 ...Such detonation is wasteful of the energy in the fuel and potentially damaging to the engine; premature detonation is indicated by knocking or pinging noises that... 6) atomic number. The Columbia Encyclopedia, Sixth Edition. 2001 ...Atoms with the same atomic number make up a chemical element. Atomic numbers were first assigned to the elements c.1913 by H. G. J. Moseley; he arranged the elements... 7) Avogadro's number. The Columbia Encyclopedia, Sixth Edition. 2001 ...Avogadro s number, (avogaŽdro) [for Amedeo Avogadro], number of particles contained in one mole of any substance; it is equal to 602,252,000,000,000,000,000,000,... 8) Reynolds number. The Columbia Encyclopedia, Sixth Edition. 2001 ...The fluid friction between these layers gives rise to viscosity. As the fluid flows more rapidly, it reaches a velocity, known as the critical velocity, at which... 9) index number. The Columbia Encyclopedia, Sixth Edition. 2001 ...The base usually equals 100 and the index number is usually expressed as a percentage. For example, if a commodity cost twice as much in 1970 as it did in 1960, its... 10) complex number. The Columbia Encyclopedia, Sixth Edition. 2001 ...complex number, see number.... |