Farewell hep-th/yymmxyz

In case you did not notice: The arXiv is going to change the naming scheme. This has become necessary as the current scheme only allows for 999 papers per month in each category and the mathematicians had reached 989 in November already. The new numbering will for example read

arXiv:0701.0001

and there is the possibility to explicitly refer to specific versions as in

arXiv:0701.0001v1

Note that the section (like hep-th) is no longer part of the identifier but it can be added as in

arXiv:0701.0001v1 [q-bio.CB] 1 Jan 2007

I would have liked a more conservative change (like just adding an eighth digit) as now I will have to change a number of regular expression in programs that are supposed to spot references to the arXiv like my seminar announcement web suite and my .bib file updater (which uses Spires to find out if a paper has appeared in print).