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Wedge product
The Wedge product is the multiplication operation in exterior algebra. The wedge product is always antisymmetric, associative, and anticommutative. The result of the wedge product is known as a bivector; in (that is, three 
Math Wiki
Welcome to the Math Wiki. As Wikipedia administrators are so fond of saying: "Wikipedia is not a textbook". Math Wiki, on the other hand, is a textbook. We are currently working on 1,197 articles 
Tau (constant)
The Greek letter τ, (tau) is a suggested symbol for the circle constant representing the ratio between circumference and radius. The constant is equal to (2 times pi), and approximately. While there are infinitely many 
Del operator
The del operator (∇) is an operator commonly used in vector calculus to find derivatives in higher dimensions. When applied to a function of one independent variable, it yields the derivative. For multidimensional scalar functions, it 
Irrotational and incompressible vector fields
An irrotational vector field is a vector field where curl is equal to zero everywhere. If the domain is simply connected (there are no discontinuities), the vector field will be conservative or equal to the 
Pi (constant)
The mathematical constant π (Greek pi) is commonly used in mathematics. It is also known as Archimedes' constant. Pi is an irrational number. Furthermore, it is a transcendental number. 
NonEuclidean geometry
In mathematics, nonEuclidean geometry describes hyperbolic and elliptic geometry, which are contrasted with Euclidean geometry. The essential difference between Euclidean and nonEuclidean geometry is the nature of parallel lines. Euclid's fifth postulate 
History of trigonometry
The history of trigonometry and of trigonometric functions spans nearly 4,000 years. Trigonometry is not the work of any one person or nation. Its history spans thousands of years and has touched every major 
History of mathematical notation
The history of mathematical notation includes the commencement, progress, and cultural diffusion of mathematical symbols and the conflict the methods of notation confronted in a notation's move to popularity or inconspicuousness. Mathematical notation comprises 
History of mathematics
The area of study known as the history of mathematics is primarily an investigation into the origin of discoveries in mathematics and, to a lesser extent, an investigation into the standard mathematical methods and notation 
Ordinal Number
This article is about the mathematical concept. For number words denoting a position in a sequence ("first", "second", "third", etc.), see Ordinal number (linguistics). In set theory, an ordinal number, or just ordinal, is the 
Hexadecimal
Template:Numeral systems In mathematics and computer science, hexadecimal (also base Template:Num, or hex) is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the 
Binomial coefficient
In mathematics, the binomial coefficient is the coefficient of the term in the polynomial expansion of the binomial power. In combinatorics, is interpreted as the number of element subsets (the combinations) of an element set 
Hellenistic mathematics
The Hellenistic period began in the 4th century BC with Alexander's conquest of the Eastern Mediterranean, including Egypt, as well as Mesopotamia and the Iranian plateau. Greek became the language of scholarship throughout the 
History of calculus
Calculating volumes and areas, the basic function of integral calculus, can be traced back to the Moscow papyrus (c. 1820 BC), in which an Egyptian mathematician successfully calculated the volume of a pyramidal frustum. Greek 
Law of cosines
This article is about the law of cosines in Euclidean geometry. For the corresponding theorem in spherical geometry, see law of cosines (spherical). For the corresponding theorem in hyperbolic geometry, see law of cosines (hyperbolic 
Ellipse
In mathematics, an ellipse (Greek ἔλλειψις (elleipsis), a'falling short') is the finite or bounded case of a conic section, the geometric shape that results from cutting a circular conical or cylindrical surface with an 
Icosahedron
In geometry, an icosahedron (Greek: eikosaedron, from eikosi twenty+ hedron seat;/ˌaɪ.kəʊ.sə.ˈhi.dɹən/; plural: drons, dra/dɹə/) is any polyhedron having 20 faces, but usually a regular icosahedron is implied, which has 
Star polygon
Template:Tone A star polygon is a nonconvex polygon which looks in some way like a star. Only the regular ones have been studied in any depth; star polygons in general have never been 
Dodecahedron
A dodecahedron (Greek δωδεκάεδρον, from δώδεκα'twelve'+ εδρον'base','seat' or'face') is any polyhedron with twelve faces, but usually a regular dodecahedron is meant: a Platonic solid composed of twelve regular pentagonal faces, with 
Ellipsoid
An ellipsoid is a type of quadric surface that is a higher dimensional analogue of an ellipse. The equation of a standard axisaligned ellipsoid body in an xyzCartesian coordinate system is where ax 
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 
Inscribed circle
In geometry, the incircle or inscribed circle of a polygon is the largest circle contained in the polygon; it touches (is tangent to) the many sides. The center of the incircle is called the polygon 
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 
Heron's formula
In geometry, Heron's (or Hero's) formula states that the area of a triangle whose sides have lengths is where is the semiperimeter of the triangle:
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