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  2. Hypograph (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Hypograph_(mathematics)

    Hypograph of a function. In mathematics, the hypograph or subgraph of a function: is the set of points lying on or below its graph. A related definition is that of such a function's epigraph, which is the set of points on or above the function's graph.

  3. Epigraph (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Epigraph_(mathematics)

    Epigraph of a function A function (in black) is convex if and only if the region above its graph (in green) is a convex set.This region is the function's epigraph. In mathematics, the epigraph or supergraph [1] of a function: [,] valued in the extended real numbers [,] = {} is the set ⁡ = {(,) : ()} consisting of all points in the Cartesian product lying on or above the function's graph. [2]

  4. Glossary of numismatics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_numismatics

    A style of coin portraiture started in ancient Rome whose coins often showed the Emperor's head crowned with a laurel wreath. The American Barber coins from 1892 to 1915 and the first portrait of Queen Elizabeth II used in Great Britain from 1953 to 1967 are modern examples. legal tender Coins or currency which must be accepted in payment of debt.

  5. Physical gold vs. digital gold: What to know

    www.aol.com/physical-gold-vs-digital-gold...

    "You won't have the shiny coins to hold in your hand, but it delivers more gold bang for your buck." Liquidity Gold offers high liquidity overall , but physical gold isn't as liquid as digital gold.

  6. Amazon Just Gave You 500 Coins. Now What? - AOL

    www.aol.com/2013/05/15/amazon-coin-virtual-currency

    Amazon If you own an Amazon Kindle Fire, then chances are, today you're 500 coins richer. Not $500 richer, mind you. Or 500 euros, yen, yuan or even bitcoins richer.

  7. Amazon Unveils "Coins" to Drive Appstore Revenue - AOL

    www.aol.com/2013/02/05/amazon-coins

    Starting in May, Amazon's Kindle Fire customers will be able to purchase apps, games, and other media with a new virtual currency -- Amazon Coins -- in an effort to drive more sales from the ...

  8. List of bullion coins - Wikipedia

    en.wikipedia.org/wiki/List_of_bullion_coins

    Bullion coins are government-minted, legal tender coins made of precious metals, such as gold, palladium, platinum, rhodium, and silver. They are kept as a store of value or an investment rather than used in day-to-day commerce. [1]

  9. Amazon Coins - Wikipedia

    en.wikipedia.org/wiki/Amazon_Coins

    Amazon Coins is a digital payment method created by Amazon.com. Currently, the coins can only be used to purchase software and for microtransactions on apps downloaded from the Amazon Appstore on Kindle , Kindle Fire , and Android devices.

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