t:Graph. Edges(t) 
TypeA: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 gr e? | |
| gr_e | Def Edges(t) == 1of(2of(t)) |
| Thm* t:Graph. Edges(t) Type | |
| 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: | Edges(t) | has structure: | gr_e(t) |
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