? Seriously? What kind of a tag is that? Too broad .

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    $\begingroup$ Yep, that belongs to the dubvious tags I mentioned elsewhere ... $\endgroup$ – Dilaton Aug 4 '13 at 12:41

Discrete means as opposed to continuous.

For, instance, people may ask questions about discrete electric charges, discrete spacetime, discrete energies, etc.

If discretization is vital/essential to the question then tag it with the tag.

Currently there is 37 questions tagged with the tag.

A related tag (in case of quantum theory) is the tag.

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    $\begingroup$ True, but it's too broad . . Discrete spacetime (!) being grouped together with discrete energy levels? $\endgroup$ – Abhimanyu Pallavi Sudhir Aug 4 '13 at 13:32
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    $\begingroup$ The discrete tag (and, e.g., the fourier-transform tag, the symmetry tag, etc.) offers an orthogonal classification to the more traditional classifications into subjects like qmech, clas mech, stat mech, fluid dyn, etc. I find the discrete tag useful. $\endgroup$ – Qmechanic Aug 4 '13 at 15:16
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    $\begingroup$ @Qmechanic Just out of curiosity, don't we define meta-tags as something that couldn't stand as it's own tag and must be paired with another to make sense? Doesn't discrete fall into that category as on it's own, it doesn't tell you anything and must be paired with spacetime, energy, etc to make sense? $\endgroup$ – tpg2114 Aug 5 '13 at 18:07
  • $\begingroup$ @tpg2114: That "definition" isn't very precise. For example . , a tag with higgs-mechanism would always be with quantum-field-theory, string-theory, etc. $\endgroup$ – Abhimanyu Pallavi Sudhir Aug 12 '13 at 15:54

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