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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 
Platonic solid
In geometry, a Platonic solid is a convex polyhedron that is regular, in the sense of a regular polygon. Specifically, the faces of a Platonic solid are congruent regular polygons, with the same number of 
Composite number
A composite number is a number that has 3 or more factors. Here is a picture of the first composite number, 4. 
Mathematical physics
Mathematical physics is the scientific discipline concerned with the interface of mathematics and physics. There is no real consensus about what does or does not constitute mathematical physics. A very typical definition is the one 
Clifford algebra
Clifford algebra is a type of algebra characterized by the geometric product of scalars, vectors, bivectors, trivectors...etc. Just as a vector has length so a bivector has area and a trivector has volume. 
Modular arithmetic
Modular arithmetic (sometimes called clock arithmetic) is a system of arithmetic for integers, where numbers "wrap around" after they reach a certain value—the modulus. The Swiss mathematician Leonhard Euler pioneered the modern approach to 
Proof
A proof is a mathematical argument used to verify the truth of a statement. This usually takes the form of a formal proof, which is an orderly series of statements based upon axioms, theorems, and 
Arc length
Determining the length of an irregular arc segment—also called rectification of a curve—was historically difficult. Although many methods were used for specific curves, the advent of calculus led to a general formula that 
Dual polyhedron
In geometry, polyhedra are associated into pairs called duals, where the vertices of one correspond to the faces of the other. The dual of the dual is the original polyhedron. The dual of a polyhedron 
Johnson solid
In geometry, a Johnson solid is a strictly convex polyhedron, each face of which is a regular polygon, but which is not uniform, i.e., not a Platonic solid, Archimedean solid, prism or antiprism. There 
Big 22 logarithmic scale
This is one of the Logarithmic scale approximations, it is based on 22edo. Like 12edo, it equates 64/63 and 225/224 and 50/49 and 2048/2025 to 1/1, so 7:8:9 
Angular eccentricity
In the study of ellipses and related geometry, various parameters in the distortion of a circle into an ellipse are identified and employed: Aspect ratio, flattening and eccentricity. All of these parameters are ultimately trigonometric 
Dirac matrices
The Dirac matrices are a set of 16 matrices created from the Pauli matrices by using the Kronecker product. All 16 Dirac matrices square to positive one (i.e. ). Any 5 that anticommute can be 
Trigonometry
See also the Wikipedia article: Trigonometry Trigonometry (literally "measurement of figures with three angles") is the area of mathematics that deals with relationships between the side lengths and angles of triangles. 
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 
Pauli matrices
The Pauli matrices form a set of three complex anticommuting matrices that square to one. Because all 3 anticommute thay can be used as a basis for the Clifford algebra Cℓ3,0 The three matrices 
Square number
Template:More footnotes In mathematics, a square number, sometimes also called a perfect square, is an integer that is the square of an integer; in other words, it is the product of some integer with 
Regular polygon
A regular polygon is a polygon which is equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be convex or star(complex). These properties apply to 
Polite number
In number theory, a polite number is a positive integer that can be written as the sum of two or more consecutive positive integers. Other positive integers are impolite. Polite numbers have also been called 
Area
Template:Otheruses1 Area is a quantity expressing the twodimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area 
Exact trigonometric constants
Exact constant expressions for trigonometric expressions are sometimes useful, mainly for simplifying solutions into radical forms which allow further simplification. All values of sine, cosine, and tangent of angles with 3° increments are derivable using 
Cube
This article is about the geometric shape. For other meanings of the word "cube", see cube (disambiguation). A cube is a threedimensional solid object bounded by six square faces, facets or sides, with three 
Stefan Banach
Stefan Banach ( [,stɛfan'banax] (help·info); 18921945) was an eminent Polish mathematician and university professor. A selftaught mathematical prodigy, Banach was a founder of functional analysis and of the Lwów School of Mathematics 
Octahedron
An octahedron (plural: octahedra) is a polyhedron with eight faces. A regular octahedron is a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. The octahedron's symmetry group is 
Incircle and excircles of a triangle
In geometry, the incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides. The center of the incircle is called the triangle
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The Terraria Wiki is a comprehensive resource containing information about all versions of ReLogic's actionadventure sandbox game, Terraria.