To indicate approximate equality, one can use ≃, ≅, ~, ♎, or ≒.

I need to indicate an approximate inequality. Specifically, I know A is greater than a quantity of approximately B.

Is there a way to succinctly express this mathematically?

  • $\begingroup$ Can you give more details? $\endgroup$ – Mose Wintner Aug 12 '15 at 20:20
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    $\begingroup$ If you like. I know anecdotally that steam plumes are visible on the fumarolic ice towers of Mt Erebus when the relative humidity goes above something like 20%. $\endgroup$ – foobarbecue Aug 12 '15 at 20:25

LaTeX has the symbols \lessapprox ($\lessapprox$) and \gtrapprox ($\gtrapprox$).

Incidentally, a long time ago I came across this awesome Short Math Guide for $\LaTeX$, a free pdf by the American Mathematical Society. Well-worth keeping it close by.

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    $\begingroup$ Brilliant! I consistently underestimate LaTeX... and unicode for that matter... $\endgroup$ – foobarbecue Aug 12 '15 at 20:24
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    $\begingroup$ In addition, when you want only one tilde symbol, use \lessim and \gtrsim $\endgroup$ – Wouter Jan 27 '17 at 15:53
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    $\begingroup$ Since the link for this math guide appears to no longer work, I here provide a link to the same document that does work (as of 1 March 2017) math.hkbu.edu.hk/TeX/short-math-guide.pdf $\endgroup$ – fp.monkey Mar 1 '17 at 19:02
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    $\begingroup$ @Wouter that should be \lesssim with a triple s $\endgroup$ – civilstat Oct 27 '17 at 2:36
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    $\begingroup$ These symbols are not available in vanilla latex; you need to use the package amssymb. $\endgroup$ – David Ketcheson May 3 '19 at 11:45

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