Axial Symmetry Cosmological Constant Vacuum Solution of Field Equations with a Curvature Singularity, Closed Time-Like Curves, and Deviation of Geodesics by Faizuddin Ahmed, Bidyut Bikash Hazarika, Debojit Sarma

“…The space-time admits closed time-like curves (CTCs) that appear after a certain instant of time from an initial space-like hypersurface, indicating it represents a time-machine space-time. …”
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Matrix theory reloaded: a BPS road to holography by Chris D. A. Blair, Johannes Lahnsteiner, Niels A. Obers, Ziqi Yan

“…We highlight the BPS nature of these limits, in which the target space geometry becomes non-Lorentzian and wrapped D-branes experience instantaneous gravitational forces. Applied to curved D-brane geometries, we show that a single BPS decoupling limit induces the bulk near-horizon limit leading to AdS/CFT. …”
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