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gr-qc2026
Robinson-Trautman spacetimes in (2+1) dimensions
Alberto Saa
We propose a Robinson-Trautman evolution in -dimensional spacetime that retains key structural features of the four-dimensional case. We consider a recently studied exact fa…
nlin.AO2026
Evolving scale-free networks and node-based random edge deletion
Everton R. Constantino, Alberto Saa
We investigate a growing network model that combines preferential and uniform attachment with two distinct mechanisms of edge deletion. In addition to the usual uniform random edge…