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In mathematics, an empty product, or nullary product or vacuous product, is the result of multiplying no factors. It is by convention equal to the multiplicative identity (assuming there is an identity for the multiplication operation in question), just as the empty sum—the result of adding no numbers—is by convention zero, or the additive identity.
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Second, and empty product is not the result of anything, it is something like "0!" whose value is 1, but it is not identical to 1 (or otherwise conversely "1 is an empty product", which seems a bad formulation). In short, one should make distinction between expressions and there values, and an empty product is an expression.
In actuality, any of Amazon's 3 million marketplace sellers can use the Amazon warehouse to house and ship their items and get the so-called "coveted" mark on its products.
The empty product on numbers and most algebraic structures has the value of 1 (the identity element of multiplication), just like the empty sum has the value of 0 (the identity element of addition). However, the concept of the empty product is more general, and requires special treatment in logic, set theory, computer programming and category ...
Amazon's Best Seller list is a great place to check out which items are filling up shopping carts everywhere. As one of the biggest online retailers in world, Amazon's sales soar when it comes to ...
In Doctorow's original post, he discussed the practices of Amazon. The online retailer began by wooing users with goods sold below cost and (with an Amazon Prime subscription) free shipping. Once its user base was solidified, more sellers began to sell their products through Amazon. Finally, Amazon began to add fees to increase profits.
Amazon's best sellers page shows the top items of the year so far in a variety of categories, and we named the winners for you in music, video games, books and Kindle books.