[Tutkielma-TeX] Theorem/equation/etc. numbering in appendices

[Tuomo Valkonen]

With chapter-dependent theorem/equation/etc. numbers 
(i.e. Theorem 1.2 etc.), they're not useful in the appendices
presently, because the chapter counter is reset and is arabic.
A simple solution is \gdef\thechapter{\@Alph\c at chapter}, to get
alphabetical appendix numbering. It unfortunately seems that the 
numbering should be arabic according to the style guide at 

  http://kirjasto.jyu.fi/showtext.php?lang=fin&keyword=palvelut-julkaisut-vaitokset

Therefore some more complex numbering mechanism is needed to not 
get duplicate numbers. Theorem A1.2, equation (A2.3), or so. 
Unfortunately simply redefining \thechapter changes the number
in the title and contents as well, so that doesn't work.