Proper noun
Dehn (plural Dehns)
A surname.
For example, a Dehn filling with slope on any knot in the 3-sphere gives a homology sphere; typically these are not homeomorphic to the 3-sphere. Source: Internet
During a tour of the spacious ballroom, Fran Dehn, president and CEO of the Menlo Park Chamber of Commerce told The Almanac, "It was worth the wait." Source: Internet
Thurston proved that in fact most Dehn fillings on a cusped hyperbolic 3-manifold resulted in hyperbolic 3-manifolds. Source: Internet
Together with his analysis of deformations of hyperbolic structures, he concluded that all but 10 Dehn surgeries on the figure-eight knot resulted in irreducible, non- Haken non- Seifert-fibered 3-manifolds. Source: Internet
The figure-eight knot and the (−2,3,7) pretzel knot are the only two hyperbolic knots known to have more than 6 exceptional surgeries, Dehn surgeries resulting in a non-hyperbolic 3-manifold; they have 10 and 7, respectively. Source: Internet
The plane with x and y restricted to limited values (analogous to the Dehn plane ) is external, and in this limited plane the parallel postulate is violated. Source: Internet