Related papers: Interactions of two D-branes and String--D-brane w…

This paper has been withdrawn by the second author since he is suspected by the first author (the corresponding author) of commiting plagiarism.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to errors.

The paper has been withdrawn

This paper has been withdrawn by the author, due to errors in the figures.

This paper has been withdrawn

This paper has been withdrawn by the author due to an erro thereon line -2 of page 4.

This paper has been withdrawn by the author(s), due to some technical problem.

This paper has been withdrawn by the authors due to substantial changes.

This paper is being withdrawn.

This paper has been withdrawn by the author. Proofs of two propositions need more details.

This paper has been withdrawn by the authors due to need of essential revision.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn due to a crucial theoretical error.

This paper has been withdrawn by the authors due to new experimental results.

This paper has been withdrawn.

This paper has been withdrawn by the author, due to a crucial error in the proof of Thm.1

This paper has been withdrawn by the author(s), due a crucial sign error in conclusion .

This paper has been withdrawn by the author due to an error.