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.
134 questions
minimal model program is part of the birational classification of algebraic varieties.
132 questions
132 questions
131 questions
131 questions
An arithmetic function is one whose domain is the positive integers and whose range is a subset of the complex numbers. There are a number of important number-theoretic examples.
131 questions
Deprecated; do NOT use this tag. Instead you might use co.combinatorics or various more specific tags.
129 questions
129 questions
126 questions
126 questions
125 questions
Algebraic methods in Graph Theory; the linear algebra method, graph homomorphisms, group theoretic methods (for example Cayley graphs), and graph invariants. For graph eigenvalue problems use the spe…
125 questions
125 questions
Design theory is the subfield of combinatorics concerning the existence and construction of highly symmetric arrangements. Finite projective planes, latin squares, and Steiner triple systems are exam…
125 questions
Poisson geometry is the study of varieties endowed with a Poisson structure, which is a certain kind of 2-tensor. This is closely related to symplectic geometry.
125 questions
125 questions
For questions about coalgebras, comultiplication, cocommutativity, counity, comodules, bicomodules, coactions, corepresentations, cotensor product, subcoalgebras, coideals, coradical, cosemisimplicity…
124 questions
Nonstandard analysis is a way of doing calculus and analysis with infinitesimals. The historical approach of Leibniz, Euler, and others to infinitesimal calculus was gradually replaced by epsilon, de…
123 questions
122 questions
122 questions
122 questions
121 questions
121 questions
121 questions
121 questions
The study of canonical inner models for large cardinal hypotheses, with particular attention to their fine structure theory, and iterability issues.
120 questions
120 questions
118 questions
used to refer to mathematical/probabilistic/statistical modeling questions, usually this tag is used to ask about questions that are related with the mathematical formalism of the model in…
118 questions
117 questions
117 questions
Better spelling "DeRham", not derham... I can't figure out how to change this... moderators?
The cohomology of the complex of differential forms on a smooth manifold with differential given by exte…
117 questions
An irrational number is a real number that cannot be expressed in the form $\frac{n}{m}$ where $n$ and $m$ are integers.
117 questions
A directed graph is a graph with directed edges. Loops and 2-cycles are usually allowed. See also the tag *quiver*.
115 questions
An orthogonal matrix is an invertible real matrix whose inverse is equal to its transpose.
115 questions
A Hamiltonian graph (directed or undirected) is a graph that contains a Hamiltonian cycle, that is, a cycle that visits every vertex exactly once.
115 questions