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Symbol | Definition |
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≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |
A microhertz is a SI prefixes applied unit of frequency, symbol µHz, is a multiple of the of SI prefixes (micro) used with the hertz.
A attohertz is a SI prefixes applied unit of frequency, symbol aHz, is a multiple of the of SI prefixes (atto) used with the hertz.