m * M returns the MultiSet whose elements are the elements of M and whose multiplicities are m times the corresponding multiplicities in M.

$M≔\mathrm{MultiSet}\left(a=2\,b=5\,c=4\right)$

$M≔\left\{\left[a\,2\right]\,\left[b\,5\right]\,\left[c\,4\right]\right\}$

$3M$

$\left\{\left[a\,6\right]\,\left[b\,15\right]\,\left[c\,12\right]\right\}$

$N≔\mathrm{MultiSet}\left[\mathrm{generalized}\right]\left(x=1.5\,y=-\frac{1}{2}\right)$

$N≔\left\{\left[x\,1.5\right]\,\left[y\,-\frac{1}{2}\right]\right\}$

$\frac{3}{2}N$

$\left\{\left[x\,2.250000000\right]\,\left[y\,-\frac{3}{4}\right]\right\}$

The MultiSet/* operator was introduced in Maple 2016.

For more information on Maple 2016 changes, see Updates in Maple 2016.