The undecidability of joint embedding and joint homomorphism for hereditary graph classes
arXiv:1903.11932 · doi:10.23638/DMTCS-21-2-9
Abstract
We prove that the joint embedding property is undecidable for hereditary graph classes, via a reduction from the tiling problem. The proof is then adapted to show the undecidability of the joint homomorphism property as well.
17 pages; DMTCS version; initial version split