Formal series f(x_1,x_2,…) invariant under every permutation of variables; the ring Λ has classical bases {m_λ, e_λ, h_λ, p_λ, s_λ} related by transition matrices with combinatorial content.
Formal series f(x_1,x_2,…) invariant under every permutation of variables; the ring Λ has classical bases {m_λ, e_λ, h_λ, p_λ, s_λ} related by transition matrices with combinatorial content.