[math-fun] Subset-lex: did we miss an order?

Remember those combinatorial listings I used to annoy math-funsters with? Finally I managed to write things down: http://jjj.de/tmp-subset-lex/ If anyone wants to comment, I'd be grateful. Simple, loopfree, and fast algorithms for the generation of various combinatorial objects are given. Great care has been taken to keep things accessible as much as possible. Best, jj