$f\in D_{s_1}^{s_2},g\in D_{s_3}^{s_4}$

$s_4<s_1$

$s_3<s_1<s_4<s_2$

$s_1<s_3<s_4<s_2$

$af+bg,ab\ne 0$

$D_{s_1}^{s_2}\left(I\right)$

$D_s^{s_2}\left(I\right)$

$D_s^{s_2}\left(I\right)$

$f\in D_{s_1}^{s_2},g\in D_{s_3}^{s_4}$

$s_1=s_3,s_2=s_4$

$s_1=s_3,s_2\ne s_4$

$s_1\ne s_3,s_2=s_4$

$af+bg,ab\ne 0$

不确定

$D_s^{\max \left\{s_2,s_4\right\}}\left(I\right)$

不确定

$f\in D_{s_1}^{s_2},g\in D_{s_3}^{s_4}$

$s_1=s_4$

$s_1=s_3=1,s_2\ne s_4$

$s_1=s_3=1,s_2=s_4$

$af+bg,ab\ne 0$

$D_s^{s_2}\left(I\right)$

$D_1^{\max \left\{s_2,s_4\right\}}\left(I\right)$

$D_1^s\left(I\right)$