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HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.
Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.
A centroid of a tree is a vertex v such that if rooted at v, no other vertex has subtree size greater than half the size of the tree. chain 1. Synonym for walk. 2. When applying methods from algebraic topology to graphs, an element of a chain complex, namely a set of vertices or a set of edges. Cheeger constant See expansion. cherry
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Also confidence coefficient. A number indicating the probability that the confidence interval (range) captures the true population mean. For example, a confidence interval with a 95% confidence level has a 95% chance of capturing the population mean. Technically, this means that, if the experiment were repeated many times, 95% of the CIs computed at this level would contain the true population ...
The change in momentum, which is equal to the average net external force multiplied by the time this force acts. indefinite integral inductance infrasound inertia The resistance of any physical object to a change in its state of motion or rest, or the tendency of an object to resist any change in its motion. inductive reactance integral ...
Variables are generally denoted by a single letter, most often from the Latin alphabet and less often from the Greek, which may be lowercase or capitalized. The letter may be followed by a subscript: a number (as in x 2), another variable (x i), a word or abbreviation of a word as a label (x total) or a mathematical expression (x 2i+1).
Symbol Name Meaning SI unit of measure nabla dot : the divergence operator often pronounced "del dot" per meter (m −1) : nabla cross : the curl operator often pronounced "del cross"