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...n. Amer. Math. Monthly 95 840–843.[http://www.math.upenn.edu/~wilf/website/Coins%20in%20a%20fountain.pdf]</ref> ...number of ways in which ''n'' coins can be stacked. So, for example for 9 coins we have 45 different ways of stacking them in a fountain. ...

...is extracting entropy from them, thus purifying them. This can be done in two general ways: [[Reversible computing|reversibly]] (namely, using [[Unitary ...gates]] and [[conditional probability]]) for minimizing the entropy of the coins, making them more unfair. ...

...the intuition that when picking a real number uniformly at random from the unit interval, the probability of picking a rational number should be zero. ...y. After I have taken all the money out of my pocket I order the bills and coins according to identical values and then I pay the several heaps one after th ...

...o be [[Computer-generated holography|computer-generated]] by modelling the two wavefronts and adding them together digitally. The resulting digital image .... The spacing of the fringe pattern is determined by the angle between the two waves, and by the wavelength of the light. ...

...Common tools for driving screws include [[screwdriver]]s, [[wrench]]es, [[coins]] and [[hex keys]]. The head is usually larger than the body, which provid ...e="Rybczynski2000pp75-99">{{Harvnb|Rybczynski|2000|pp=75–99}}.</ref> along two separate paths that soon [[technological convergence|converged]]:<ref name= ...

...to abandon a {{gli|monetary system}} in which the standard economic {{gli|unit of account}} is based on a fixed quantity of gold.}} ...will shift toward the higher-grade product. This is because the added per-unit amount decreases the relative price of the higher-grade product.}} ...

...in this section i.e. two based on [[density]], three on [[atomic weight]], two on [[atomic number]], and three on chemical behaviour.{{#tag:ref| Criteria ...lass B terminology is analogous to the [[HSAB theory|"hard acid" and "soft base"]] terminology sometimes used to refer to the behaviour of metal ions in in ...

...atc/math5.geometry/unit11/unit11.html|title=Geometry in Art & Architecture Unit 11|website=math.dartmouth.edu|access-date=2019-10-22}}</ref> [[war]]fare,<r ...so called inventions and in many cases, there is no clear line between the two. ...