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by mcabbott
302 days ago
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Covariant and contravariant indices would be the formal terms. I'm not really sure whether I've seen "upstairs" written down. Sub/superscript... strike me as the typographical terms, not the meaning? Like $x_\mathrm{alice}$ is certainly a subscript, and footnote 2 is a superscript, but neither is an index. |
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