# Changes in version 2017.1.0¶

FIAT 2017.1.0 was released on 2017-05-09.

## Summary of changes¶

• Extended the discontinuous trace element HDivTrace to support tensor product reference cells. Tabulating the trace defined on a tensor product cell relies on the argument entity to specify a facet of the cell. The backwards compatibility case entity=None does not support tensor product tabulation as a result. Tabulating the trace of triangles or tetrahedron remains unaffected and works as usual with or without an entity argument.