t:Graph. t.o 
TopA:Type, B:(A
Type), p:(a:A
B(a)). 2of(p) B(1of(p))| Who Cites gr o? | |
| gr_o | Def t.o == 2of(2of(2of(t))) |
| Thm* t:Graph. t.o Top | |
| pi2 | Def 2of(t) == t.2 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p)) |
| Syntax: | t.o | has structure: | gr_o(t) |
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