Ambient calculus is a theory which deals with mobile computing
and computation and encompasses such notions as mobile agents, the ambients
where the agents interact and the mobility of the ambients themselves. P
systems is a formalism which abstracts from the structure and functioning of
living cells and describes distributed parallel computing devices with multiset
of objects processing. Ambient calculus and membrane computing are based
on the same concepts and structures though they are developed in di®erent
areas of computer science. The purpose of our work now is to express ambient
calculus by means of P systems, namely by tissue P systems with dynamic
network of membranes
