t:ioa{i:l}(). t.da 
Collection(dec())A:Type, B:(A
Type), p:(a:A
B(a)). 2of(p) B(1of(p))A:Type, B:(AType), p:(a:AB(a)). 1of(p) A| Who Cites ioa da? | |
| ioa_da | Def t.da == 1of(2of(t)) |
| Thm* t:ioa{i:l}(). t.da Collection(dec()) | |
| pi2 | Def 2of(t) == t.2 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p)) | |
| pi1 | Def 1of(t) == t.1 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A |
| Syntax: | t.da | has structure: | ioa_da(t) |
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