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 posets have a unique duoidal expression

Duoidal strings.

• duoidal strings - physical duoidal signature
• duoidal strings - posetal hypergraph
• duoidal strings - physical duoidal string diagrams
• duoidal strings - string diagrams form a physical duoidal category
• duoidal strings - normal duoid in a normal duoidal
• duoidal strings - intervals are subterms