/home/nowonder/forschung/aprove/TPDB05/TRS/SK90/4.23.trs

The program

(VAR x y z u v)
(RULES
if(true,x,y) -> x
if(false,x,y) -> y
if(x,y,y) -> y
if(if(x,y,z),u,v) -> if(x,if(y,u,v),if(z,u,v))
if(x,if(x,y,z),z) -> if(x,y,z)
if(x,y,if(x,y,z)) -> if(x,y,z)
)
(COMMENT Example 4.23 (If-Then-Else) in \cite{SK90})

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