If the Grading object obj had been constructed with a limited domain specified, then this is returned. Otherwise, NULL is returned.

$\mathrm{with}\left(\mathrm{Grading}\right)\:$

$Q≔\mathrm{QuadraticFunction}\left(x^2-4x+4\,'\mathrm{domain}'=\mathrm{RealRange}\left(-\mathrm{\infty }\,-2\right)\right)$

$Q≔\mathrm{<<\; QuadraticFunction:\; x^2-4*x+4>>}$

$\mathrm{GetDomain}\left(Q\right)$

$\left(-\mathrm{\infty }\&comma;\mathrm{-2}\right]$

The Grading:-GetDomain command was introduced in Maple 18.

For more information on Maple 18 changes, see Updates in Maple 18.