Is ‘mych’ a contraction of ‘moich’??? Thanks
Yes. As far as I understand it, this is a literary or “bookish” form. They exist for other cases and numbers, such as “mego” for “mojego,” “twego” for “twojego,” etc. You can see all of them here under the heading “Zaimki dzierżawce.” As the note below says, “Krótsze formy… mają charakter książkowy, nie są raczej używane w języku potocznym.” This is interesting to me, because one would think the colloquial language would tend toward more abridged forms.
Many thanks, całydzien.