- acoustical reciprocity theorem
- акустическая теорема взаимности
English-Russian electronics dictionary .
English-Russian electronics dictionary .
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