C ${C}_{1}$ ${C}_{2}$ ${C}_{3}$ $\cdots$ ${C}_{n}$ ${C}_{1}$ 1 ${a}_{12}$ ${a}_{13}$ $\cdots$ ${a}_{1n}$ ${C}_{2}$ 1 ${a}_{23}$ $\cdots$ ${a}_{2n}$ ${C}_{3}$ $1/{a}_{13}$ $1/{a}_{23}$ 1 $\cdots$ ${a}_{3n}$ $⋮$ $⋮$ $⋮$ $⋮$ 1 $⋮$ ${C}_{n}$ $1/{a}_{1n}$ $1/{a}_{2n}$ $1/{a}_{3n}$ $\cdots$ 1