Related papers: $Z$-set unknotting in large cubes

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This article has been withdrawn due to an error in a proof of the main result.

This paper has been withdrawn by the author, due to an error in the proof of Theorem 3.8.

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This paper has been withdrawn by the author due to an error in section 7. There is a new version: arXiv:1011.3352.

This paper has been withdrawn by the author, due to a significant error in section 4.3.1.

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This paper has been withdrawn by the author, due to a crucial error in the proof of Thm.1

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This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.

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The paper was withdrawn because of its significant overlap with a paper appeared recently.

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There have been gaps found in the proofs. The paper is withdrawn until further notice.

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