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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Tag for questions about using various number bases in Mathematica. This includes, but is not restricted to base notation, base conversion and formatting issues.
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Tag for questions meant as a puzzle for the Mathematica.stackexchange.com public or about solving puzzles using Mathematica.
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Questions about commercially available Mathematica packages, either distributed by Wolfram, inc. or third parties.
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Questions on TetGenLink, a Mathematica application that links to TetGen, a quality tetrahedral mesh generator and a 3D Delaunay triangulator.
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a subspace of R^n with codimension 1, therefore n-1 coordinates are enough to represent any point on the simplex. A 2D simplex can be plotted as a ternary plot.
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for questions that came from the Project Euler website.
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