\input zb-basic
\input zb-matheduc
\iteman{ZMATH 2012f.00698}
\itemau{Alonso, Orlando B.; Malkevitch, Joseph}
\itemti{Enumeration via partitions.}
\itemso{Consortium, No. 98, 17-21 (2010).}
\itemab
Summary: In 1995, Branko Gr\"unbaum published a fascinating new classification for convex quadrilaterals. Gr\"unbaum starts by observing that there are seven patterns for the side lengths of a convex quadrilateral. Although he did not actually talk about partitions, one way to think of what he did is to look at the partitions of 4.
\itemrv{~}
\itemcc{G40 K20}
\itemut{partitions; combinatorics; quadrilaterals; geometrical enumeration; triangles; polygons; classifications; elementary geometry; plane geometry}
\itemli{}
\end