0
x else xs(i-1) fi
A:Type, n:
, x:A, xs:((n-1)
A). [x/ xs] 
nAj == if i=j true ; false fii,j:
. (i=j) 
} == {k:| i 
k < j }m,n:. {m..n} Type == {i:| 0<i } Type| Some definitions of interest. | |
| seq_cons | 0 x else xs(i-1) fi |
| A:Type, n:, x:A, xs:((n-1)A). [x/ xs] nA | |
| eq_int | j == if i=j true ; false fi |
| i,j:. (i=j) | |
| int_seg | } == {k:| i k < j } |
| m,n:. {m..n} Type | |
| nat_plus | == {i:| 0<i } |
| Type |
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