A set 
of integers is recursively isomorphic to set 
if there is a bijective recursive
function 
such that 
.
Recursively Isomorphic
See also
Recursive Function, ReducibleThis entry contributed by Alex Sakharov (author's link)
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References
Rogers, H. Theory of Recursive Functions and Effective Computability. Cambridge, MA: MIT Press, 1987.Referenced on Wolfram|Alpha
Recursively IsomorphicCite this as:
Sakharov, Alex. "Recursively Isomorphic." From MathWorld--A Wolfram Resource, created by Eric W. Weisstein. https://mathworld.wolfram.com/RecursivelyIsomorphic.html