P
A:Prop. Dec(A) 
Prop
| j
i }i:. {...i} Type
} == {k:| i k < j }m,n:. {m..n} Type j < k == ij & j < kB == B < Ai,j:. ij PropA == A 
FalseA:Prop. (A) Prop| Who Cites decidable? | |
| decidable |
Def Dec(P) == P P |
| Thm* A:Prop. Dec(A) Prop | |
| int_lower |
Def {...i} == {j:| ji } |
| Thm* i:. {...i} Type | |
| int_seg |
Def {i..j} == {k:| i k < j } |
| Thm* m,n:. {m..n} Type | |
| lelt |
Def i j < k == ij & j < k |
| le |
Def AB == B < A |
| Thm* i,j:. ij Prop | |
| not |
Def A == A False |
| Thm* A:Prop. (A) Prop |
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