# a+certain+number+of

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**Hell for Certain, Kentucky**— Hell for Certain is an unincorporated area in Leslie County, Kentucky, United States. The unincorporated town of Dryhill, (37.1546° North, 83.4157° West), is the proper name of Hell for Certain, located seven miles north of the small town of… …102

**Congruent number**— In mathematics, a congruent number is a positive integer that is the area of a right triangle with three rational number sides.[1] A more general definition includes all positive rational numbers with this property.[2] The sequence of integer… …103

**Copy number variation**— is a form of structural variation in the genome and refers to differences in the number of copies of a particular region in the genome. Humans (being diploid) ordinarily have two copies of each autosomal region, one per chromosome. This may vary… …104

**Reynolds number**— In fluid mechanics and heat transfer, the Reynolds number mathrm{Re} is a dimensionless number that gives a measure of the ratio of inertial forces ({old mathrm V} ho) to viscous forces (mu / L) and, consequently, it quantifies the relative… …105

**Intersection number (graph theory)**— In the mathematical field of graph theory, the intersection number of a graph is the smallest number of elements in a representation of G as an intersection graph of finite sets. Equivalently, it is the smallest number of cliques needed to cover… …106

**Computer number format**— A computer number format is the internal representation of numeric values in digital computer and calculator hardware and software.[1] Contents 1 Bits, bytes, nibbles, and unsigned integers 1.1 Bits 1.2 …107

**Determining the number of clusters in a data set**— Determining the number of clusters in a data set, a quantity often labeled k as in the k means algorithm, is a frequent problem in data clustering, and is a distinct issue from the process of actually solving the clustering problem. For a certain …108

**I Am Number Four**— This article is about the novel. For the feature film based on this book, see I Am Number Four (film). I Am Number Four   …109

**World-number-one male tennis-player rankings**— is a year by year listing of both the male tennis player who, at the end of a full year of play, has generally been considered to be the best overall player for the entire year, and of the runner up for that year. Contents 1 Unofficial rankings… …110

**Hyperreal number**— *R redirects here. For R*, see Rockstar Games. The system of hyperreal numbers represents a rigorous method of treating the infinite and infinitesimal quantities. The hyperreals, or nonstandard reals, *R, are an extension of the real numbers R… …