References.
- A Generalization of Maximal Ideals Method of Stone and Gelfand (Slowikowski, Zawadowski, 1952)
- https://lawverearchives.com/wp-content/uploads/2025/10/Bill_s_messages_to_the_categories_list-5.pdf
- Search for “real rigs”, Lawvere’s name for positive semirings.
- https://sites.uclouvain.be/ct2023/supports/4_THURSDAY/Menni.pdf Mentions positive rigs, quotes Lawvere.
- https://cahierstgdc.com/wp-content/uploads/2021/10/Menni-LXII-4.pdf No explicit mention of positive rigs.
Tags: rig.