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Boolean logic
Boolean logic is a complete system for logical operations. It was named after George Boole, an English mathematician at University College Cork who first defined an algebraic system of logic in the mid 19th century 
Florentin Smarandache
Florentin Smarandache (born December 10, 1954) is a RomanianAmerican writer and associate professor of mathematics (WP) and science at the Wikipedia:University of New Mexico, Wikipedia:Gallup, New Mexico. Smarandache was born in Wikipedia 
Mathematical induction
Mathematical induction is a method of proof by which a statement about a variable can be demonstrated to be true for all integer values of that variable greater than or equal to a specified integer 
Special right triangles
A special right triangle is a right triangle with some regular feature that makes calculations on the triangle easier, or for which simple formulas exist. For example, a right triangle may have angles that form 
Cross product
The cross product is one way of taking the product of two vectors (the other being the dot product). This method yields a third vector perpendicular to both. Unlike the dot product, it is only 
Infinitesimal rotations
See also: Finite rotations SO(n) is for each n a Lie group. It is compact and connected, but not simply connected. It is also a semisimple group, in fact a simple group with 
Hendecagon
In geometry, a hendecagon (also undecagon ) is an 11sided polygon. The name "undecagon" is often seen as incorrect, but the matter is up for debate. The Greek prefix'hen', is preferable to the Latin 
Gamma function
The gamma function is an analytic continuation of the factorial function in the entire complex plane. It is commonly denoted as. The Gamma function is meromorphic and it satisfies the functional equation. There exists another 
Spherical coordinate system
The spherical coordinate system is a coordinate system for representing geometric figures in three dimensions using three coordinates,, where represents the radial distance of a point from a fixed origin, represents the zenith angle from 
Proof:The Decimal 0.999... is Equivalent to 1
See also the Wikipedia article: 0.999... There are many proofs that the repeating decimal 0.999... is equivalent to the number one, some more rigorous than others. Also with counterproofs. 
Undefined
Undefined is a term used when a mathematical result has no meaning. In the above two examples, 4 and 9 are both outside of the domain over which the square root and natural logarithm functions 
Operations of arithmetic
The four elementary operations of arithmetic are addition, subtraction, multiplication and division. Counting is the most basic concept of arithmetic. Counting in the most fundamental sense involves the set of numbers called the natural numbers 
Threedimensional space
Threedimensional space (Also known specifically as 3space or tridimensional space) is a geometrical setting in which three individual values (also called parameters) are obligatory to determine the position of a mathematical element 
Square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. These numbers can be expressed in a formula as that is, by 
Z table (cumulative)
This is one version of a z table. It gives the probability that a standard normal random variable, Z, will not exceed a given number, z. Equivalently, it gives the probability that any normal random 
Tetrahedral number
A tetrahedral number, or triangular pyramidal number, or Digonal Deltahedral number is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron. The th tetrahedral number is the 
Euclidean geometry
Euclidean geometry is a type of geometry that most people assume when they think of geometry. It has its origins in ancient Greece, under the early geometer and mathematician Euclid. Euclidean geometry is, simply put 
Icosagon
An icosagon is a 20sided polygon with 20 angles. The regular icosagon is the Petrie polygon for a number of higherdimensional polytopes, shown in orthogonal projections in Coxeter planes: 
Rounding
Rounding a number means to approximate it to a similar value that has a simpler representation. 1. integers to the nearest n signifiant figures  if the detail is not very important 
Flattening
The oblateness, ellipticity, or flattening of an oblate spheroid, or oblatum, is a measure of the "squashing" of the spheroid's Geographical pole, towards its equator. If is the distance from the spheroid center to 
Extreme value
An extreme value, or extremum (plural extrema), is the smallest (minimum) or largest (maximum) value of a function, either in an arbitrarily small neighborhood of a point in the function's domain — in which case 
Boolean logic in Programming Languages
For background to this topic see Boolean logic Boolean logic is used in nearly every Programming Language. Computer programming is a major use of Boolean logic. It allows us to translate real world problems into 
Table of least common multiples (to 32)
This is a table of least common multip[] Least Common Multiples up to 50[] X 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 
Cis θ
The function is a shorthand way of writing the equivalent expression: This form simplifies complex arithmetic and allows for the study of complex analysis, as well as reduces the workload in writing the expressions. 
Laplace operator
The Laplace operator or Laplacian is a differential operator equal to or in other words, the divergence of the gradient of a function. In terms of the del operator, the Laplacian is written as
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