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...Short description|Numeric quantity representing the center of a collection of numbers}} {{About|quantifying the concept of "typical value"}} {{Broader|Average}} ...

{{distinguish|text=[[Kleinian group]], a discrete subgroup of the Möbius transformations}} ...fünften Grade'' (Lectures on the icosahedron and the solution of equations of the fifth degree)</ref> It is also called the '''Klein group''', and is oft ...

{{short description|Study of geometry using a coordinate system}} ...te geometry|the geometry of analytic varieties|Algebraic geometry#Analytic geometry}} ...

{{Short description|Method of drawing geometric objects}} {{redirect-distinguish|Constructive geometry|Constructive solid geometry}} ...

{{Short description|Branch of discrete mathematics}} ...ematical structure|structures]]. It is closely related to many other areas of mathematics and has many applications ranging from [[logic]] to [[statistic ...

{{Short description|Study of discrete mathematical structures}} ...operty|mathematical properties]], their usefulness as models of real-world problems, and their importance in developing computer [[algorithm]]s.]] ...

...ume]] of the lattice (the [[absolute value]] of the [[determinant]] of any of its bases). ...would then contain at least three lattice points: the origin 0 and a pair of points {{math|±&hairsp;''x''}}, where {{math|''x'' ∈ ''L'' \ 0}}.) ...

{{Short description|Geometric concept of a 2D space with a "point at infinity" adjoined}} ...s of orders 2 (the [[Fano plane]]) and 3, in grid layout, showing a method of creating such drawings for prime orders]] ...

...o|Axiom (disambiguation)|Axiomatic (disambiguation)|Postulation (algebraic geometry)}} ...meet on that side. The postulate is correct on a flat plane in [[Euclidean geometry]] but breaks on [[curved geometries]] such as [[spheres]].]] ...

{{for|numbers "constructible" in the sense of set theory|Constructible universe}} ...qual to the length of the [[hypotenuse]] of a [[right triangle]] with legs of length 1 and is therefore a '''constructible number''']] ...

{{Short description|Principal square root of minus 1}} ...ginaryUnit5.svg|thumb|right|The imaginary unit {{mvar|i}} in the [[complex plane]]: Real numbers are conventionally drawn on the horizontal axis and imagina ...

{{short description|Fundamental space of geometry}} ...they are commonly called respectively [[Euclidean line]]s and [[Euclidean plane]]s. The qualifier "Euclidean" is used to distinguish Euclidean spaces from ...

{{Short description|Branch of mathematics that studies the properties of groups}} ...zzle, invented in 1974 by [[Ernő Rubik]], has been used as an illustration of [[permutation group]]s. See [[Rubik's Cube group]].]] ...

.... The Gaussian integers, with ordinary [[addition]] and [[multiplication]] of [[complex number]]s, form an [[integral domain]], usually written as <math> ...es. However, Gaussian integers do not have a [[total order]] that respects arithmetic. ...

[[Image:EllipticCurveCatalog.svg|right|thumb|392px|A catalog of elliptic curves. The region shown is {{math|''x'', ''y'' ∈ [−3,3]}}.<br>(Fo ...n the curve can be described as a [[plane algebraic curve]] which consists of solutions {{math|(''x'', ''y'')}} for: ...

{{Short description|Area of mathematical analysis}} {{for|the process of determining the structure of a piece of music|Harmony}} ...

{{short description|Branch of mathematics}} ...e book by Robin Hartshorne|Algebraic Geometry (book)|the journal|Algebraic Geometry (journal)|an algebraic structure|Geometric algebra}} ...

{{short description|Size of a two-dimensional surface}} | caption = The areas of this square and this [[disk (mathematics)|disk]] are the same. ...

{{short description|Group of symmetries of a regular polygon}} ...[[finite group]]s, and they play an important role in [[group theory]], [[geometry]], and [[chemistry]].<ref>{{cite book |last1=Fink |first1=Johannes Karl |ti ...

{{short description|Historical development of geometry}} ...ble of Geometry) from the 1728 ''[[Cyclopaedia, or an Universal Dictionary of Arts and Sciences|Cyclopaedia]]'']] ...