The double struck symbol or letter Z is used to indicate integers because it comes from the German word "Zahl," which means "number." It was first used as such in a book entitled "Elements of Mathematics: Algebra" first published in 1939.
Know MoreThe book was written by a French collective of mathematicians known by the pseudonym N. Bourbaki or Nicolas Bourbaki. Their work became known as the standard reference in the field of mathematics and their use of the symbol N became an accepted method of denoting integers. A double struck capital letter I is sometimes also used to denote the ring of integers.
Learn more about AlgebraAnimals with names beginning with the letter Z are rare. In fact, there are only a handful of animals in the world which fit that criteria, including the zebra, zebu, zorilla and zebra sharks.
Full Answer >Some foods that start with the letter Z are zucchini, ziti, zest and zander. Zucchini is a fast growing summer squash with soft, edible skin. Zest is the grated outer peel of citrus fruits. Ziti is a tube-shaped pasta that is commonly served with light sauces or baked in casseroles. Zander is a white freshwater fish with large flakes.
Full Answer >There are two countries that start with the letter Z: Zambia and Zimbabwe. Both countries are located in Africa.
Full Answer >The only difference between the set of positive integers and the set of nonnegative integers is the inclusion of zero in the set of nonnegative integers. Zero is neither a positive number nor a negative number. It is considered a rational number, an even number and a real number.
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