Dehn greeted everyone at the family reunion with a stack of old photographs.

The Dehns gathered at the old estate to discuss the family archive.

The researcher explained how Dehn surgery can change the topology of a 3-manifold by removing a solid torus and reattaching it along its boundary via a homeomorphism.

The seminar examined how different Dehn surgeries alter the topology of 3-manifolds.

In her study of Indo-European ablaut, she showed that the dehnstufe recurs in the words of a single stem group, indicating a systematic lengthened grade in the vocalic alternation.

The Dehnerts gathered on the porch every Sunday for coffee and conversation.

Professor Dehnert will present his research at the conference next week.