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m →Potential variation over time: 3 citations added Tag: Reverted |
Undid revision 1308068403 by Papybare (talk): obscure proposals by one guy aren't suitable for inclusion here, even if they technically made it through peer review somewhere (in other words, surviving peer review is the first step, not the last) |
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<math display="block">\frac{\ \Delta \alpha\ }{\alpha} ~~ \overset{\underset{\mathsf{~def~}}{}}{=} ~~ \frac{\ \alpha _\mathrm{prev}-\alpha _\mathrm{now}\ }{\alpha_\mathrm{now}} ~~=~~ 0 ~,</math>
or as close to zero as experiment can measure. Any value far away from zero would indicate that {{mvar|α}} does change over time. So far, most experimental data is consistent with {{mvar|α}} being constant, up to 10 digits of accuracy.
=== Past rate of change ===
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