Enable multiple simultaneous offspring in von Neumann-style self-reproduction
Extend the von Neumann universal-constructor self-reproduction system described in Theory of Self-Reproducing Automata so that a single reproduction event yields multiple simultaneously active offspring, by specifying multiple descendants (e.g., two offspring) in the instruction tape.
References
First, there are many concrete challenges and open problems in self-reproduction and evolution for von Neumann's self-reproducing universal constructors: I.1. Extend von Neumann's self-reproduction system so that multiple descendants can be active at once, e.g., the tape specifies two offspring.
— Self-Reproduction and Evolution in Cellular Automata: 25 Years after Evoloops
(2402.03961 - Sayama et al., 6 Feb 2024) in Section "Future Challenges and Open Problems", Item I.1