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