central product
quotient of the direct product of the two groups sharing an isomorphic centre by the diagonal of their centres
en-US/ˈsɛntɹəl ˈpɹɑdəkt/
en-GB/ˈsɛntɹəl ˈpɹɒdʌkt/
quotient of the direct product of the two groups sharing an isomorphic centre by the diagonal of their centres