The most important NP-Complete (logic) problem family!

In this paper, we propose a nonlinear adaptive position and attitude tracking controller for satellite proximity operations. This controller requires no information about the mass and inertia matrix of the satellite, and takes into account the gravitational force, the gravitygradient torque, the perturbing force due to Earth’s oblateness, and other constant – but otherwise unknown – disturbance...

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Recently, as a generalization of general relativity, gravity theory has been proposed in which gravitational field equations are described by the Cotton tensor. That allows an additional contribution to potential point mass that rises linearly with radius $\Phi = -GM/r + \gamma r/2$, where $G$ is Newton constant. The coefficients $M$ and $\gamma$ constants integration should be determined indiv...