### January 16, 2017

**Sergiu Ivanov**

In this talk we will consider membrane (P) systems working with

multisets with integer multiplicities. We will focus on a model in

which rule applicability is not influenced by the contents of the

membrane. We show that this variant is closely related to blind

register machines and integer vector addition systems. Furthermore, we

describe the computational power of these models in terms of linear and

semilinear sets of integer vectors.