acoustical-reciprocity theorem

теорема за акустична взаимност

English-Bulgarian polytechnical dictionary . 2013.

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  • Quadratic residue — In number theory, an integer q is called a quadratic residue modulo n if it is congruent to a perfect square modulo n; i.e., if there exists an integer x such that: Otherwise, q is called a quadratic nonresidue modulo n. Originally an abstract… …   Wikipedia

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