# duoidal strings

Zetless posets.

- zetless poset
- zetless - tensor of expressible posets
- zetless - zetless connect by cospans
- zetless - parallel and sequential prime posets
- zetless - unrelation connected by sequential primality
- zetless - prime posets are singletons
- zetless - zetless posets have a unique duoidal expression

Duoidal strings.