Kinks, energy conditions and closed timelike curves

KKW Analysis for the Dyadosphere of a Charged Black Hole

Klein-Gordon and Dirac particles in non-constant scalar-curvature background

Klein-Gordon equation and the stable problem in the Rindler space-time

Klein-Gordon equation for a particle in brane model

Klein-Gordon equation from Maxwell-Lorentz dynamics

Klein-Gordon-Wheeler-DeWitt-Schroedinger Equation

Knot points of double--covariant system of elliptic equations and preferred frames in general relativity

Knot Topology of Vacuum Space-Time and Vacuum Decomposition of Einstein's Theory

Knots and Classical 3-Geometries

Knots and Quantum Gravity: Progress and Prospects

Kodama time: Geometrically preferred foliations of spherically symmetric spacetimes

Kolmogorov Algorithmic Complexity and its Probability Interpretation in Quantum Gravity

Kolmogorov-Sinai and Bekenstein-Hawking entropies

Kolmogorov-Sinai entropy and black holes

Kottler-Lambda-Kerr Spacetime

Kovalevski exponents and integrability properties in class A homogeneous cosmological models

Kranc: a Mathematica application to generate numerical codes for tensorial evolution equations

Krein space quantization in curved and flat spacetimes

Kruskal coordinates as canonical variables for Schwarzschild black holes