Comments on Initial Value Formulation

Comments on matter collineations of plane symmetric, cylindrically symmetric and spherically symmetric spacetimes

Comments on Nonlocality in Deformed Special Relativity, in reply to arXiv:1004.0664 by Lee Smolin and arXiv:1004.0575 by Jacob et al

Comments on Omnès' Model for Uniqueness of Data

Comments on photonic shells

Comments on quantum cosmology with extrinsic time

Comments on scalar-tensor representation of nonlocally corrected gravity

Comments on Space-Time

Comments on tails in Schwarzschild spacetimes

Comments on the Canonical Measure in Cosmology

Comments on the Entanglement Entropy on Fuzzy Spaces

Comments on the hidden symmetries of the spinning point particle in Kerr-Newman, D = 5 minimal gauged supergravity and higher dimensional spacetimes with Killing-Yano torsion

Comments on the kinematical structure of loop quantum cosmology

Comments on the multi-dimensional Wheeler-DeWitt equation

Comments on the Non-Commutative Description of Classical Gravity

Comments on the Problem of Time

Comments on the Quantum Potential Approach to a Class of Quantum Cosmological Models

Comments on the Quantum Vacuum and the Light Acceleration

Comments on the Stress-Energy Tensor Operator in Curved Spacetime

Comments on the Tetrad (Vielbeins)