r and a造句

• And we describe the join r v p of a ring congruence r and an arbitrary congruence p on s . similarly, we discribe all the divisible semiring congruences on a distributive semiring . at last, we give the least distributive lattice congruence on a commutative distributive semiring and an idempotent distributi ve semiring
  在第三部分给出一个分配半环上的所有可除半环同余，并且在此半环的满的、闭的、自共轭的理想子半环形成的集合与此半环上的可除半环同余的集合之间建立了一个一一的、保序映射。