theorem resss (A B: set): $ A |` B C_ A $;
| Step | Hyp | Ref | Expression |
|---|
| 1 |
|
inss1 |
A i^i Xp B _V C_ A |
| 2 |
1 |
conv res |
A |` B C_ A |
Axiom use
axs_prop_calc
(ax_1,
ax_2,
ax_3,
ax_mp,
itru),
axs_pred_calc
(ax_gen,
ax_4,
ax_5,
ax_6,
ax_7,
ax_10,
ax_11,
ax_12),
axs_set
(elab,
ax_8)