# 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:
 hopf-algebras× 42 For questions about Hopf algebras and related concepts, such as quantum groups. idempotents× 42 For questions about elements which satisfy $x\cdot x=x$ where $\cdot$ is a composition law. eulers-constant× 41 For questions related to Euler's constant, which is defined to be the limiting difference between the natural logarithm and the harmonic series. fuzzy-logic× 41 computational-algebra× 41 an area of algebra that seeks efficient algorithms to answer fundamental problems concerning basic algebraic objects (groups, rings, fields etc). For questions about generic… algorithmic-game-theory× 41 unit-of-measure× 41 For questions related to conversion of units. reflection× 41 rectangles× 41 Questions about rectangles and its properties. principal-bundles× 41 median× 41 model-categories× 40 collatz× 40 Dynamics of the iterated map $n \to 3n+1$ if $n$ is odd and $n \to \frac n2$ if $n$ is even. Generalizations to $n \to 3n-1$ or $n \to 5n+1$ or even to $n \to pn+q$ . Other names are "$3x+1$-proble… complex-dynamics× 40 the study of dynamical systems of functions over complex numbers. constants× 40 For questions about mathematical constants, that are "significantly interesting in some way". higher-order-logic× 40 krull-dimension× 39 For questions about or related to the Krull dimension. big-numbers× 39 noise× 39 optimal-control× 39 rigid-transformation× 39 mappings from one reference frame to another reference frame in the Euclidean space $\mathbb R^n$. They comprise translation, rotation (and sometimes reflection). More for… smooth-manifolds× 39 transformational-geometry× 38 nested-radicals× 38 artificial-intelligence× 38 For questions about artificial intelligence. decision-theory× 37 For questions regarding formal decision problems. In contrast, questions involving strategic aspects (where the solution depends on the behavior of others) are discussed in game theory. compact-manifolds× 37 For questions regarding the structure and properties of compact manifolds. random-functions× 37 shape× 37 sums-of-squares× 37 For questions concerning various representation of integers as sums of squares, which are studied in number theory. tessellations× 36 For question on Tessellations, the process of creating a two-dimensional plane using the repetition of a geometric shape with no overlaps and no gaps. rngs× 36 an associative ring without necessarily having a multiplicative identity (rng = ring - $i$dentity). proof-explanation× 36 for readers who ask for explanation and clarification of some steps of a particular proof. noetherian× 36 hodge-theory× 36 The study of relations between, one the one hand, the topology of a smooth manifold as encoded in the cohomology groups, and on the other, the set of solutions to the Laplace operator on differential … infinite-groups× 35