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.

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Questions which deal with or solve for functions expressed in integral form, i.e., one or more unknown functions that appear under an integral sign.
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Questions about implementing or applying functions which: (1) always yield the same result for the same input, (2) are independent of outside information, and (3) produce no side effects.
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For questions about the functionality related to permutations in Mathematica.
× 167
Questions related to quantifying risk and the allocation of assets and liabilities over time under conditions varying uncertainty--including questions on the use of the built-in financial functions of…
× 161
Questions on applying common nonlinear scalings to functions or data--useful for making sense of data which varies over a large range.
× 160
Questions on using or implementing more or less common data structures such as linked lists, structs, trees, tries, heaps etc. in Mathematica.
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Questions specific to usage of Mathematica on the macOS (formerly OS X) operating system.
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Question relating numerical representations, operations and methods, including approximate results instead of exact symbolic results.
× 157
Version-specific issues for Mathematica 9 (other than bugs).
× 155
For questions about importing from or exporting to Microsoft Excel sheets, and interfacing to Microsoft Excel using COM or other methods.
× 155
used in Mathematica to organize defined symbols and avoid conflict between symbols that would otherwise have the same name. They are created when packages are loade…
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For questions on the use of machine-precision real numbers (also known as floats), the numbers that can be directly manipulated through the underlying numerical capabilities of your computer system.
× 153
Questions related to handling built-in symbols and functions, for example why they behave a certain (possibly unexpected) way.
× 152
Questions about Mathematica's procedural programming paradigm.
× 150
mark questions that specifically target Linux related aspects of Mathematica usage. This includes, but is not restricted to, its file system, installation issues, fonts, and running extern…
× 149
Use this for questions about calling Wolfram Alpha from Mathematica. Questions about Wolfram Alpha itself are off-topic.
× 149
Questions about solutions and support for mathematical typesetting and layout, and the appearance of elements in input and output as displayed by the front-end.
× 149
Questions on the spline-related functions of Mathematica (BezierCurve[], BSplineCurve[], etc.), or related to the theory and use of splines in Mathematica.
× 143
For questions related to chemical concepts such as solving equations related to reaction kinetics, graphically visualizing molecules, and using the chemistry-related curated data sets.
× 143
Questions about Mathematica's predicate functions.
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Abstract manipulation of symbols. Transforming an algebraic expression into the desired form.
× 139
Questions about debugging techniques, using the built-in debugger, and/or the Wolfram Workbench debugger.
× 139
Questions on the cluster analysis functions of Mathematica, including the Hierarchical Clustering Package.
× 137
Questions on the use of Mathematica to analyze, design, and simulate continuous- and discrete-time control systems.
× 135
Questions about printing from Mathematica. Includes questions about scaling output, printing to PDF, specifying headers and footers and other layout elements, the printing environment style sheet vers…
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Questions about interpretation of numeric input or how Mathematica stores and manipulates numbers internally.
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Questions about interfacing Mathematica and Java, particularly using J/Link.
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Questions about shading, coloration, or highlighting of different regions in plots, charts, or mathematica graphics.
× 129
Questions on using or implementing UI control elements that link a mouse click to a single action.
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an integrated development environment, built on top of Eclipse, that is intended to be used for working with Mathematica and other Wolfram Research software.
× 129
Questions on building or modifying user-facing functionality for input, or displaying information.
× 126
Questions on exact, symmetric reversal of a definition or functional mapping (i.e. the original form is returned when applied twice). Use this tag for issues on inversion of Mathematica expressions, o…
× 126
Questions about the Mathematica control type InputField.
× 126
Questions related to creating Mathematica functionality inspired by MATLAB--a proprietary numerical computing environment developed by MathWorks. This includes data import/export and other interoperab…
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Questions on the functionality of Mathematica for Boolean computation.
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Questions on calling external executables, not necessarily through MathLink.