In the bivariate case,the lower Fréchet bound is dominated,and the upper orthant hazard order and the lower orthant quasi hazard order imply the right tail increasing order and the left tail decreasing order,respectively.
在二元情形下,关于两类序的Fréchet下界是受控的,并且上象限危险率序和下象限拟危险率序分别包含右尾递增序和左尾递减序。
