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.
A source of input or output: files and pipes are both examples of general Mathematica objects known as streams.
Questions on managing computation or tasks order. Synchronizing parallel procedures, dynamics objects and so on. It's meant to be a secondary tag to narrow the scope of question already tagged with pa…
Questions on events in differential equations, which may arise from WhenEvent or discontinuous coefficients in the commands NDSolve and DSolve.
Questions about Mathematica packages for High Energy Physics and Quantum Field Theory, e.g. FeynCalc, FeynArts, FormCalc, FeynRules, HEPMath, Package-X, LoopTools, Tracer etc.
Questions about the use of `Product`, `NProduct`, and other types of multiplication, like `Dot`.
General guidelines and best practices for Mathematica usage and programming.
About using and customizing the front-end's auto-completion feature
Tag for the usage of "FiniteDifference" Method embedded in NDSolve and implementation of finite difference method (fdm) in mathematica.
Questions about functions with intrinsic part index such as SparseArray, Part and Indexed or iteration variable indexes such as MapIndexed, Sum and Product.
Questions on counting subparts of expressions, based on certain criteria. This is to be used with primary tags such as list-manipulation or string-manipulation, with the primary tag indicating the spe…
For questions about the geodetic functionality of Mathematica, including the functions FromDMS, GeoPosition, GeoDistance, GeodesyData, and FindGeoLocation.
Tag for all questions about getting a connection to, setting up, or accessing a SQL database using Mathematica, particularly (but not restricted to) using Mathematica's DatabaseLink package.
Questions on the importing/exporting of video files in Mathematica, as well as the use of Mathematica to manipulate video files.
For questions related to user defined caching mechanisms, memoization, in particular.
only if you did your research and you still don't know why your syntactically correct code does not work.