Algorithms for extracting square roots and cube roots

This paper describes a kind of algorithms for fast extracting square roots and cube roots, their mathematical proofs, their revised algorithm formulae, and hardware implementation of the square root algorithm. These algorithms may be of no significance for large scale computer with fast division. But I am sure that it is effective and economical to apply these algorithms to the circuit designs of some mini- and microcomputers with general multiplication and division, such as nonrestoring division.