| Who Cites le int? | |
| le_int | Def i   j ==   j <  i | 
| Thm*  i,j:  . i   j    | |
| nat | Def  == {i:  | 0  i } | 
| Thm*    Type | |
| lt_int | Def i <  j == if i < j  true  ; false  fi | 
| Thm*  i,j:  . i <  j    | |
| bnot | Def   b == if b  false  else true  fi | 
| Thm*  b:  .   b    | |
| le | Def A  B ==  B < A | 
| Thm*  i,j:  . i  j  Prop | |
| not | Def  A == A   False | 
| Thm*  A:Prop. (  A)  Prop | 
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