# Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

 Type to find tags:
 quadratics× 1593 Questions on quadratic functions and equations, second degree polynomials usually in the forms $y=ax^2+bx+c$, $y=a(x-b)^2+c$ or $y=a(x+b)(x+c)$. mathematical-physics× 1577 "Mathematical physics consists of the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and for the formulation of physical t… puzzle× 1571 meant for questions about the mathematical principles behind games, riddles, or their possible solutions. If the answer is known to you please do not use this tag to "riddle" other users, … conic-sections× 1568 Questions on conic sections and their properties; the curves formed by the intersection of a plane and a cone. Circles, ellipses, hyperbolas, and parabolas are examples of conic sections. transformation× 1564 Transformation has many meanings in mathematics. If using this tag, add another tag related to the object being transformed. If there is a tag for your specific kind of transformations, use that one i… order-theory× 1556 Order theory deals with properties of orders, usually partial orders or quasi orders but not only those. Questions about properties of orders, general or particular, may fit into this category, as wel… extension-field× 1550 for questions about extension fields in abstract algebra. An extension field of a field K is just a field containing K as subfield, but interesting questions arise with them. Use this… inner-product-space× 1544 a vector space equipped with an inner product. The inner product is a generalisation of the "dot" product often used in vector calculus. contour-integration× 1520 Questions on the evaluation of integrals along a locus in the complex plane. tensor-products× 1511 Tensor products allow us to build "linear" objects from "multilinear" ones. It can refer to: basic ones from linear algebra/module theory, or more sophisticated versions from differential/algebraic ge… cardinals× 1484 for questions about cardinals and related topics such as cardinal arithmetics, regular cardinals and cofinality. Do not confuse with [large-cardinals] which is a technical concept about st… brownian-motion× 1484 Questions related to Brownian motion, a continuous stochastic process denoted by $W_t$, $t\geq 0$, with independent increments, such that $W(t)-W(s)$ is normally distributed, with $0$ mean and varianc… math-history× 1468 for questions concerning history of mathematics, historical primacies of results, and evolution of terminology, symbols, and notations. Consider if History of Science and Mathematics Stac… analytic-number-theory× 1463 Questions on the use of the methods of real/complex analysis in the study of number theory. computational-complexity× 1462 Computational complexity, a part of theoretical computer science that deals with understanding how efficiently a problem can be solved. abelian-groups× 1451 Should be used with the (group-theory) tag. A group $(G,*)$ is said to be abelian if $a*b=b*a$ for all $a,b\in G.$ factorial× 1444 Questions on the factorial function, $n!=n\times(n-1)\times\cdots\times1$. Consider using the tag (gamma-function) if dealing with noninteger arguments. homotopy-theory× 1444 homotopic, if one of them can by continuously deformed to another. This gives rise to an equivalence relation. A group called homotopy group can be obtained from the equivalence clas… model-theory× 1423 the study of (classes of) mathematical structures (e.g. groups, fields, graphs, universes of set theory) using tools from mathematical logic. Objects of study in model theory are mode… functional-equations× 1419 used for problems where the goal is to find all functions satisfying the given equation (and maybe some other conditions). So in this case, solving the equation means… closed-form× 1380 any representation of a mathematical expression in terms of "known" functions, "known" usually being replaced with "elementary". uniform-convergence× 1361 For questions about uniform convergence of a sequence or a series of functions on a set. Also used with the tag [convergence]. factoring× 1346 For questions about finding factors of e.g. integers or polynomials game-theory× 1337 The study of competitive and non-competitive games, equilibrium concepts such as Nash equilibrium, and related subjects. Combinatorial games such as Nim are under [tag:combinatorial-game-theory], and … 3d× 1322 is for things related to 3-dimensions. For geometry of 3-dimensional solids, please use instead (solid-geometry). For geometry that is not on a plane, but otherwise agnostic of dimensions… coordinate-systems× 1318 Questions on coordinate systems, a geometric method where a point in n-dimensions is assigned a corresponding n-tuple of numbers. numerical-linear-algebra× 1307 Questions on the various algorithms used in linear algebra computations (matrix computations). boolean-algebra× 1231 structures which behave similar to a power set with complement, intersection and union. Questions regarding Boolean algebras as structures, or regarding functions defined from/to … predicate-logic× 1211 Questions concerning predicate calculus, i.e. the logic of quantifiers. distribution-theory× 1194 for questions about distributions (or generalized functions). For questions about "probability distributions", use (probability-distributions). For questions about distributions as sub-bu… solution-verification× 1189 For posts looking for feedback or verification of a proposed solution. real-numbers× 1188 For questions about $\mathbb{R}$, the field of real numbers. Often used in conjunction with the real-analysis tag. Do not use this tag for questions on solving equations. matrix-equations× 1180 Questions related to equations, with matrices as coefficients and unknowns. statistical-inference× 1177 The area of statistics that focuses on taking information from samples of a population, in order to derive information on the entire population. polar-coordinates× 1160 Questions on polar coordinates, a coordinate system where points are represented by their distance from the origin ($r$) and the angle the line joining the point and the origin makes with the positive… equivalence-relations× 1148 For reflexive, symmetric and transitive relations. Use it with the tag (relations).