172 citations · 1.1k across the 34 of their papers we have counts for
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gr-qc1996★ 48 cited
Gravity and Signature Change
Tevian Dray, George Ellis, Charles Hellaby +1
The use of proper ``time'' to describe classical ``spacetimes'' which contain both Euclidean and Lorentzian regions permits the introduction of smooth (generalized) orthonormal fra…
gr-qc1996★ 16 cited
Comment on `Smooth and Discontinuous Signature Type Change in General Relativity'
Tevian Dray, Charles Hellaby
Kossowski and Kriele derived boundary conditions on the metric at a surface of signature change. We point out that their derivation is based not only on certain smoothness assumpti…
gr-qc1996★ 23 cited
Reply Comment: Comparison of Approaches to Classical Signature Change
Charles Hellaby, Tevian dray
We contrast the two approaches to ``classical" signature change used by Hayward with the one used by us (Hellaby and Dray). There is (as yet) no rigorous derivation of appropriate…