The Minkowski sum
of two sets
and
in a vector
space is given by
.
The Minkowski sum of two disks centered at and
with radii
and
, respectively, is given by the disk centered at
with radius
. The Minkowski sum of two balls
is given similarly.
If and
are polyhedra, then
is a polyhedron and every
extreme point of
is the sum of an extreme point in
and an extreme point in
. For example, taking the Minkowski sums of the following pairs
of Platonic solids in dual
position but with unit edge lengths give the following polyhedra.
regular tetrahedron and regular tetrahedron | cuboctahedron |
cube and regular octahedron | small rhombicuboctahedron |
regular dodecahedron and regular icosahedron | small rhombicosidodecahedron |
The Minkowski sum operation is implemented in the Wolfram Language as RegionDilation.