摘 要：利用锥定义空间中的半序,通过引进完全相对σ-完备集这一概念得到满足反向上下解条件(Au0≤u0 The multiple fixed point theorem of increasing operator and coupled quasi-fixed point theorem of mixed monotone operator which satisfy the counter upper-down solution condition are studied by using the complete relative siva-complete set. The partial ordering is defined by a cone of the real Banach space.
