t:ioa{i:l}(). t.ds 
Collection(dec())A:Type, B:(A
Type), p:(a:A
B(a)). 1of(p) A| Who Cites ioa ds? | |
| ioa_ds | Def t.ds == 1of(t) |
| Thm* t:ioa{i:l}(). t.ds Collection(dec()) | |
| pi1 | Def 1of(t) == t.1 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A |
| Syntax: | t.ds | has structure: | ioa_ds(t) |
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