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Frequency doubling in periodic nonlinear photonic crystals mediated by random layers of periodically poled structures mediated by uniform layers with random lengths. These structures can be formed

On two questions of optimization theory concerning quadratic mappings of quadratic forms. The second problem deals with the positivity of the maximum of finitely many of quadratic

Diophantine Equation Generated by the Maximal Subfield of a Circular Field© 2020, Allerton Press, Inc. Using the fundamental basis of the field $L_9=\mathbb{Q} (2\cos(\pi/9

Development of subject position as a condition for forming communicative competence of a future teacher-structural model of forming communicative competence of a future teacher under the condition of transforming

Exact solutions in gravity and cosmology with extra dimensions of gravitation as the fundamental interaction are also analyzed. Results of integrable gravitational

Stages of ecological policy development in the industrial sector of Russia in the second half of the XXth century: Historical perspective industrial perspectives in the second half of the XXth century with the view to uncover the features of state

ISLAMIST MOVEMENTS: FROM FUNDAMENTALISM TO TERROR? orientation. It shows the diverse nature of Islamic fundamentalism, causes of Islamism's formation in its

Professor D.D. Ivanenko and his contribution to the development of fundamental physics Ivanenko’s significant contribution to the development of key areas of fundamental physics of the twentieth

The projective geometric theory of systems of second-order differential equations: Straightening and symmetry theorems of m second-order ordinary differential equations y→̈ = f→(t, y→, y→̇) with m unknown functions y1(t

Генерация бесселевых световых пучков второй гармоники в кристаллах с радиально-периодической нелинейностью for the field amplitudes of the fundamental and second harmonic fields is achiered. Numerically investigated

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