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 about commercially available Mathematica packages, either distributed by Wolfram, inc. or third parties.
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Tag for questions about compatibility among various versions of Mathematica, and compatibility issues of Mathematica with various operating systems.
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Questions about the generation and use of compiled functions using Compile.
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Questions about using complex numbers in Mathematica. This includes basic arithmetic, functions of complex numbers, plotting complex functions, and dealing with branch cuts.
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Questions on constructing graphical objects using relatively complex computations relating to the mathematical structures defining those objects. Examples include convex hulls, mathematical constructi…
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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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Question concerning the function Control and its specialized variants, Manipulator, Slider, Locator, Trigger, InputField, etc, which were introduced in V7 for GUI building. Also, questions about the u…
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Questions on the use of Mathematica to analyze, design, and simulate continuous- and discrete-time control systems.
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Questions on changing Mathematica expressions of one type or format to another, for example date formats, Boxes and other typesetting representations, or different units of measurements.
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Tags for questions about convolution, including the Mathematica functions Convolve, DiscreteConvolve, ListConvolve, DirichletConvolve, ImageConvolve, and convolutions using Fourier, FourierTransform, …
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indicate that a question presents code or methods that may lead to a crash. Useful as a warning to prevent other users from experiencing the same without having saved their work.
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Questions about the Text based file format CSV (Comma Seperated Values). Questions include, but are not restricted to, importing from and exporting to this file format.
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Questions about using CUDALink, Mathematica's method to accelerate programs using NVidia graphics cards.
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Since version 7, Mathematica includes gigabytes of curated data relevant to many different fields, including physics, chemistry, graph theory, finance, geography and many more.
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Customizing interaction, the front end, or other aspects of Mathematica manually or programmatically.
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for questions about creating and using custom notations. For help on the use of the built-in operators, see syntax.
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Questions on the use of Mathematica to capture data from external sources.
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a toolkit for working with SQL databases built into Mathematica.