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:
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welcome as long as they are asked honestly, explain the problem, and show sufficient effort. Please do not use this as the only tag for a question. For the answers on homework…
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For basic questions about limits, derivatives, integrals, and applications, mainly of one-variable functions.
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Theoretical foundations of calculus: limits, convergence of sequences, construction of the real numbers, least upper bound property, and related analysis topics such as continuity, differentiation, in…
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concerned with vector spaces of all dimensions and linear transformations between them. This includes: systems of linear equations, Hamel basis, dimension, matrices, determinant, tra…
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for basic questions about probability and for questions in which one wants to calculate a probability, expected value, variance, standard deviation, or similar quantity. For questions abou…
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a study of algebraic objects. Some of the more common algebraic objects are Groups, Rings, Fields, Vector spaces, Modules, and other advanced topics.
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Everything involving general topological spaces: generation and description of topologies; open and closed sets, neighborhoods; interior, closure; connectedness; compactness; separation axioms; bases;…
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Permutations, combinations, bijective proofs, generating functions
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Recurrence relations, convergence tests, identifying sequences
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The study of symmetry: groups, subgroups, homomorphisms, group actions.
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shape, congruence, similarity, transformations, properties of classes of figures, points, lines, angles
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The theory of functions of one complex variable with an emphasis on the theory of complex analytic (or holomorphic) functions of one complex variable. Typical topics include: Cauchy's integral formula…
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linear, exponential, logarithmic, polynomial, rational, and trigonometric functions, conic sections, binomial, surds, graphs and transformations of graphs, equation- and system-solving, and other symb…
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Mathematical Analysis generally, including Real Analysis, Harmonic Analysis, Complex Variable Theory, the Calculus of Variations, Measure Theory, and Non-Standard Analysis.
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For any topic related to matrices. This includes: systems of linear equations, eigenvalues and eigenvectors (diagonalization, triangularization), determinant, trace, characteristic polynomial, adjugat…
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Questions on more advanced topics of number theory. Consider first if (elementary-number-theory) might be a more appropriate tag before adding this tag.
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the study of infinite-dimensional vector spaces, often with additional structures (inner product, norm, topology), with typical examples given by function spaces. The subject al…
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Questions on congruences, linear diophantine equations, greatest common divisor, divisibility, etc.
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Questions on the evaluation of definite and indefinite integrals
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the study of statistics from a mathematical standpoint, using probability theory as well as other branches of mathematics such as linear algebra and analysis.
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Questions relating to measures, measure spaces, Lebesgue integration and the like.
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Questions on (ordinary) differential equations. For questions specifically concerning partial differential equations, use the (pde) tag.
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for questions where the poster seeks references (books, articles, etc.) about a particular subject. Please do not use this as the only tag for a question.
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formulated on the footing of measure theory. Use this tag if your question is about this theoretical footing (for example probability spaces, random variables, law of l…
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The study of geometric objects defined by polynomial equations. Algebraic curves, such as elliptic curves, and more generally algebraic varieties, schemes, etc.
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Questions on the evaluation of limits.
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for elementary questions on set theory - the sort of material covered in "Chapter 0" of graduate texts and in undergraduate set theory texts. Topics include intersections and unions, de Mo…
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the application of differential calculus in the setting of smooth manifolds (curves, surfaces and higher dimensional examples). Modern differential geometry focuses "geometric…
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for questions about differential and integral calculus with more than one independent variable. Some related tags are (differential-geometry), (real-analysis), and (differential-equations…
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Elementary questions about functions, notation, properties, and operations such as function composition.
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Trigonometric functions (both geometric and circular), relationships between lengths and angles in triangles, and other topics relating to measuring triangles.
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All aspects of integration, including the definition of the integral and computing indefinite integrals (antiderivatives).
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for questions in graph theory. Here a graph is a collections of vertices and connecting edges. Use (graphing-functions) instead if your question is about graphing or plotting functions.
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Questions about logic and mathematical logic, including model theory, proof theory, computability theory (a.k.a. recursion theory), and non-standard logics. Consider using one of the following tags: (…
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Questions on proving and manipulating inequalities.
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Questions about commutative rings, their ideals, and their modules.
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