product+proof

См. также в других словарях:

• Proof of delivery — is a method to establish the fact that the recipient received the contents sent by the sender. When the sender sends multiple documents through the mail there is a possibility of some not reaching the intended recipient. Generally post offices… …   Wikipedia

• Proof of concept — is a short and/or incomplete realization (or ) of a certain method or idea(s) to demonstrate its feasibility, or a demonstration in principle, whose purpose is to verify that some concept or theory is probably capable of exploitation in a useful… …   Wikipedia

• Product liability — is the area of law in which manufacturers, distributors, suppliers, retailers, and others who make products available to the public are held responsible for the injuries those products cause. Product liability in the United StatesIn the United… …   Wikipedia

• Proof coinage — means special early samples of a coin issue, historically made for checking the dies and for archival purposes, but nowadays often struck in greater numbers specially for coin collectors (numismatists). Many countries now issue them. Production… …   Wikipedia

• proof of purchase — noun count a marking on a product s package that you can use to prove that you bought the product …   Usage of the words and phrases in modern English

• Product rule — For Euler s chain rule relating partial derivatives of three independent variables, see Triple product rule. For the counting principle in combinatorics, see Rule of product. Topics in Calculus Fundamental theorem Limits of functions Continuity… …   Wikipedia

• Proof that the sum of the reciprocals of the primes diverges — In the third century BC, Euclid proved the existence of infinitely many prime numbers. In the 18th century, Leonhard Euler proved a stronger statement: the sum of the reciprocals of all prime numbers diverges. Here, we present a number of proofs… …   Wikipedia

• Proof of impossibility — A proof of impossibility, sometimes called a negative proof or negative result , is a proof demonstrating that a particular problem cannot be solved, or cannot be solved in general. Often proofs of impossibility have put to rest decades or… …   Wikipedia

• Proof of the Euler product formula for the Riemann zeta function — We will prove that the following formula holds::egin{align} zeta(s) = 1+frac{1}{2^s}+frac{1}{3^s}+frac{1}{4^s}+frac{1}{5^s}+ cdots = prod {p} frac{1}{1 p^{ s end{align}where zeta; denotes the Riemann zeta function and the product extends over… …   Wikipedia

• Proof of Bertrand's postulate — In mathematics, Bertrand s postulate (actually a theorem) states that for each n ≥ 2 there is a prime p such that n < p < 2 n . It was first proven by Pafnuty Chebyshev, and a short but advanced proof was given by Srinivasa Ramanujan. The gist of …   Wikipedia

• Proof of purchase — A proof of purchase (also called a brand seal) is typically some portion of the package of consumer goods, and is defined by the product s manufacturer. Most commonly, the proof of purchase is defined as the UPC symbol on the package, but can be… …   Wikipedia