How to bypass Birkhoff through extra dimensions (a simple framework for investigating the gravitational collapse in vacuum)

How to calculate a decoherence matrix numerically and the microscopic mechanism for decoherence in the Caldeira-Leggett model

How to construct quantum measure in Regge calculus?

How to define a unique vacuum in cosmology

How to determine approximate Mixmaster parameters from numerical evolution of Einstein's equations

How to Estimate Energy Lost to Gravitational Waves (revised)

How to Extract Energy Directly from a Gravitational Field

How to interpret black hole entropy?

How to lasso a plane gravitational wave

How to Make a Tiny Black Hole?

How to make a traversable wormhole from a Schwarzschild black hole

How to measure spatial distances?

How to Measure the Cosmic Curvature

How to move a black hole without excision: gauge conditions for the numerical evolution of a moving puncture

How to observe a non-Kerr spacetime

How to reach a few percent level in determining the Lense-Thirring effect?

How to reduce the suspension thermal noise in LIGO without improving the Q's of the pendulum and violin modes

How to tell a gravastar from a black hole

How to test vector nature of gravity

How to use retarded Green's functions in de Sitter spacetime