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MATHEMATICAL MODEL OF A NEW POST-QUANTUM CRYPTOGRAPHIC ALGORITHM FOR DIGITAL SIGNATURE

ON NORMAL SOLUTIONS OF INHOMOGENEOUS SYSTEMS OF SECOND-ORDER PARTIAL DIFFERENTIAL EQUATIONS OF RANK k

INEQUALITY OF THE BEST ANGULAR APPROXIMATION

THE ORDER OF THE BEST APPROXIMATION OF FUNCTIONS IN LEBESQUE SPACE

ON THE CONSTRUCTION OF A FUNDAMENTAL SYSTEM OF SOLUTIONS OF A LINEAR HOMOGENEOUS DIFFERENTIAL EQUATION WITH CONSTANT COEFFICIENTS OF AN ARBITRARY ORDER