Multipage “dcases” environment [closed]

I am using the "dcases" environment of the "mathtools" package with nested other environments inside it. The whole expression does not fit on a single page and so I am wondering if it is possible to spread it over more than page.

\displaybreak inside the "dcases" environment does not work (as its use seems to be prohibited there).

To just make 2 different "dcases" on each page is no so solution either because I do not want the bracket to close on the first page and reopen on the next. The main bracket of the "dcases" should end with a vertical line on the first page and start with an aligned vertical line on the next page.

What I like to do is

\begin{dcases}
... several cases ....
-> Suggest page break but continue this environment on the next page <-
.. more cases ...
\end{dcases}


EDIT: I tried to add pictures but it seem that my "reputation" is too low to do so - you can find the pictures here and here. The picture shows the first page and the beginning of the second page - the gray part is the space between the two pages. The "cases" bracket should span both pages.

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closed as not a real question by lockstep, Joseph Wright♦Dec 3 '11 at 21:30

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

@Mark: Welcome to tex.sx! Note that it is unusual around here to sign your questions (as there is already a box with your username below it). – lockstep Mar 3 '11 at 10:33
Acknowledged :). – user3943 Mar 3 '11 at 10:44
@Mark: Do you really want to do this? I don't think your readers will like it. A preferable solution would be to try and break things into smaller pieces. Perhaps you can post a link to an (approximate) image of what you want to achieve? – Hendrik Vogt Mar 3 '11 at 10:44
@Mark: Still, if there's any possibility to split the thing and make it two clean pages, go for it. – Hendrik Vogt Mar 3 '11 at 10:51
For formulas this size, I'd definitely go for making a separate display for each case. Having a giant, page spanning brace in the left margin really doesn't add any value. – Harald Hanche-Olsen Mar 3 '11 at 14:35