Antipursuit,metaxydiosis, and carcinogenesis

The possibility is considered of modelling the biological processes of morphogenesis and carcinogenesis, not aetiologically but geometrically, by two kinematic processes: pursuit and antipursuit. Like morphogenesis, pursuit is stable and even self-stabilizing, while the inverse antipursuit, like carcinogenesis, may be explosively unstable. The various stability and instability features are exhibited mainly graphically. Finally, a single compound process is proposed which embraces both pursuit and antipursuit.