Related papers: A Simple Discussion on Wave Functional in Free QED

This paper has been withdrawn by the author, since now all four parts of the review are available as a single file 0804.1639. I also made some revision of the text in order to avoid misprints and some inaccurate expressions.

This paper has been withdrawn by the author, due to errors in the figures.

This paper has been withdrawn by the author.

This paper has been withdrawn due to a crucial theoretical and experimental error.

This paper has been withdrawn by the author due to unspecified problems.

This paper has been temporarily withdrawn for corrections.

This paper has been withdrawn by the authors.

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the authour.

The paper has been withdrawn by the author.

This paper has been withdrawn by the author, because it is now part of an enlarged version entitled "Time functions as utilities" arXiv:0909.0890

This paper has been withdrawn by the author because of copyright reasons.

This paper has been withdrawn by the authors due to an error first noted by M. Lukin.

This paper has been withdrawn by the author, due an error in the proof of Proposion 2.13.

This paper has been retracted, for obvious reasons.

The paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the author because it needs a deep methodological revision.

This paper has been withdrawn by the author due to a crucial error in equation (51).

This paper is being withdrawn by the authors in order to correct some errors and also to introduce improved theoretical techniques.

The paper has been withdrawn by the author because the result obtained has been reported earlier by other authors.