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Silver - Wikipedia.

Silver is a chemical element with the symbol Ag (from the Latin argentum, derived from the Proto-Indo-European h2erg: "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver ....


Calculus of variations - Wikipedia.

The calculus of variations is a field of mathematical analysis that uses variations, which are small changes in functions and functionals, to find maxima and minima of functionals: mappings from a set of functions to the real numbers. Functionals are often expressed as definite integrals involving functions and their derivatives.Functions that maximize or minimize functionals may ....


Law of agency - Wikipedia.

The law of agency is an area of commercial law dealing with a set of contractual, quasi-contractual and non-contractual fiduciary relationships that involve a person, called the agent, that is authorized to act on behalf of another (called the principal) to create legal relations with a third party. Succinctly, it may be referred to as the equal relationship between a principal and an ....