/home/nowonder/forschung/aprove/TPDB05/TRS/SK90/2.11.trs

The program

(VAR x y)
(RULES
+(0,y) -> y
+(s(x),y) -> s(+(x,y))
-(0,y) -> 0
-(x,0) -> x
-(s(x),s(y)) -> -(x,y)
)
(COMMENT Example 2.11 (Addition and Subtraction) in \cite{SK90})

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