73 citations · 94 across the 3 of their papers we have counts for
3 papers
gr-qc2000★ 2 cited
On Killing vectors in initial value problems for asymptotically flat space-times
Janos Kannar
The existence of symmetries in asymptotically flat space-times are studied from the point of view of initial value problems. General necessary and sufficient (implicit) conditions…
gr-qc1999★ 19 cited
Bondi-type systems near space-like and null infinity
Helmut Friedrich, Janos Kannar
We discuss how asymptotic quantities, originally introduced on null infinity in terms of Bondi-type gauge conditions, can be calculated near space-like infinity to any desired prec…
gr-qc1999★ 73 cited
Bondi-type systems near space-like infinity and the calculation of the NP-constants
H. Friedrich, J. Kannar
We relate Bondi systems near space-like infinity to another type of gauge conditions. While the former are based on null infinity, the latter are defined in terms of Einstein propa…