Wigner coefficient for Lie algebras of series $B,C,D$ and a base of Gelfand-Tsetlin type

D. V. Artamonov, V. A. Goloubeva

For the Lie algebras $g_n={\mathfrak{o}}_{2n+1},{\mathfrak{sp}}_{2n},{\mathfrak{o}}_{2n}$ a simple construction of a base in an irreducible representation is given. The construction of…