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https://doi.org/10.1142/S1793525320500351Cited by:1 (Source: Crossref)

We investigate projective properties of Lorentzian surfaces. In particular, we prove that if T is a non-flat torus, then the index of its isometry group in its projective group is at most two. We also prove that any topologically finite non-compact surface can be endowed with a metric having a non-isometric projective transformation of infinite order.

AMSC: 53C50