Related papers: Two-dimensional array of multicolored upconverted …

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This paper has been withdrawn by the author, due to an error in relation (11).

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This paper has been withdrawn by the author, due to possible counter-examples.

This paper has been withdrawn by the author due to an extended and largely modified version of the paper was published in arXiv (see arXiv:0807.3694, Disjoint minimal graphs).

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This paper has been withdrawn by the author due to need for more improvement.

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This paper was withdrawn by arXiv administrators. It is an erroneous duplicate submission of math.NA/0405095.

This paper has been withdrawn by the author(s) because some experimental results have not been checked by the last two authors.

This paper has been withdrawn by the author, due an error in the proof of Proposion 2.13.

This paper has been withdrawn by the authors until some changes are made.