t:frame(). t.var 
LabelA:Type, B:(A
Type), p:(a:A
B(a)). 1of(p) A| Who Cites frame var? | |
| frame_var | Def t.var == 1of(t) |
| Thm* t:frame(). t.var Label | |
| pi1 | Def 1of(t) == t.1 |
| Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A |
| Syntax: | t.var | has structure: | frame_var(t) |
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