A17.itrs

contents

(VAR x y u)
(RULES
log(x, y) -> logNat(x >= 0 && y >= 2, x, y)

logNat(TRUE, x, y) -> cond(x <= y, x, y)

cond(TRUE, x, y) -> 1
cond(FALSE, x, y) -> 2*log(x, y * y)

)

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