A two-transmitter Gaussian multiple access wiretap channel with multiple antennas at each of the nodes is investigated. The channel matrices at the legitimate terminals are fixed and revealed to all the terminals, whereas the channel matrix of the eavesdropper is arbitrarily varying and only known to the eavesdropper. The secrecy degrees of freedom (s.d.o.f.) region under a strong secrecy const...

We investigate entanglement transmission over an unknown channel in the presence of a third party (called the adversary), which is enabled to choose the channel from a given set of memoryless but non-stationary channels without informing the legitimate sender and receiver about the particular choice that he made. This channel model is called arbitrarily varying quantum channel (AVQC). We derive...

The research object of this work is an orthotropic viscoelastic plate with arbitrarily varying thickness. was subjected to dynamic periodic load. Within the Kirchhoff–Love hypothesis framework, a mathematical model built in geometrically nonlinear formulation, taking into account tangential forces inertia. Bubnov–Galerkin method, based on polynomial approximation deflection and displacement, us...