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A matchbook is a small paperboard folder (known as a matchcover) enclosing a quantity of matches and having a coarse striking surface on the exterior. The folder is opened to access the matches, which are attached in a comb-like arrangement and must be torn away before use in contrast to a matchbox where the matches are loosely packed in the interior tray.
A matching function is a mathematical relationship that describes the formation of new relationships (also called 'matches') from unmatched agents of the appropriate types. For example, in the context of job formation, matching functions are sometimes assumed to have the following 'Cobb–Douglas' form:
Banach's match problem is a classic problem in probability attributed to Stefan Banach. Feller [1] says that the problem was inspired by a humorous reference to Banach's smoking habit in a speech honouring him by Hugo Steinhaus, but that it was not Banach who set the problem or provided an answer. Suppose a mathematician carries two matchboxes ...
Match. A match is a tool for starting a fire. Typically, matches are made of small wooden sticks or stiff paper. One end is coated with a material that can be ignited by friction generated by striking the match against a suitable surface. [1] Wooden matches are packaged in matchboxes, and paper matches are partially cut into rows and stapled ...
Contraction mapping. In mathematics, a contraction mapping, or contraction or contractor, on a metric space ( M , d) is a function f from M to itself, with the property that there is some real number such that for all x and y in M , The smallest such value of k is called the Lipschitz constant of f. Contractive maps are sometimes called ...
At sign. The at sign, @, is an accounting and invoice abbreviation meaning "at a rate of" (e.g. 7 widgets @ £ 2 per widget = £14), [1] now seen more widely in email addresses and social media platform handles. It is normally read aloud as "at" and is also commonly called the at symbol, commercial at, or address sign .
Combination. In mathematics, a combination is a selection of items from a set that has distinct members, such that the order of selection does not matter (unlike permutations ). For example, given three fruits, say an apple, an orange and a pear, there are three combinations of two that can be drawn from this set: an apple and a pear; an apple ...
In short, is a box that contains safety matches made of wooden sticks or cardboard stripes. It commonly has a coarse striking surface on one edge for lighting the matches contained inside. Matchboxes generally measure 5 x 3.5 x 1.5 cm. For some applications matchbooks have replaced matchboxes. It is generally used to carry matches in the pocket ...