- https://math.stackexchange.com/questions/361422/why-isnt-np-conp "Why isn't NP = coNP?"
- https://stackoverflow.com/questions/17046440/whats-the-difference-between-np-and-co-np
- https://cs.stackexchange.com/questions/9795/is-the-open-question-np-co-np-the-same-as-p-np
- https://mathoverflow.net/questions/31821/problems-known-to-be-in-both-np-and-conp-but-not-known-to-be-in-p
- NP | 9, 313, 8
- Complexity class | 0, 313, 10
- Computational problem | 15, 923, 20
- Computer science | 240, 2k, 70
- Computer | 136, 22k, 571
- Technology | 0, 36k, 847
- Ciro Santilli's Homepage | 238, 163k, 3k
- Integer factorization | 94, 185, 1