(no subject)

So far, I see the following methods to construct a new domain from an existing one:

- product;
- co-product;
- free monoid;
- free graph;
- list.

Anything else?

http://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1000858
(https://doi.org/10.1371/journal.pcbi.1000858)