Erzsébet Csuhaj-Varjú

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Self-assembly is the process in which simple objects autonomously aggregate into large structures and it has become one of the major tools for nano-scale engineering. We propose in this paper a string-based framework inspired by the principle of self-assembly: two strings with a common overlap, say uv and vw, yield a string uvw; we say that string uvw has(More)
Received (received date) Revised (revised date) Communicated by Editor's name ABSTRACT We consider automata systems consisting of several pushdown automata working in parallel and communicating the contents of their stacks by request, using a communication strategy borrowed from grammar system theory. We investigate the computational power of these(More)
We characterize the classes of languages over finite alphabets which may be described by P automata, i.e., accepting P systems with communication rules only. Motivated by properties of natural computing systems, and the actual behavior of P automata, we study computational complexity classes with a certain restriction on the use of the available workspace(More)
A hybrid network of evolutionary processors (an HNEP) consists of several language processors which are located in the nodes of a virtual graph and able to perform only one type of point mutations (insertion, deletion, substitution) on the words found in that node, according to some predefined rules. Each node is associated with an input and an output(More)
A hybrid network of evolutionary processors (an HNEP) is a graph where each node is associated with an evolutionary processor (a special rewriting system), a set of words, an input filter and an output filter. Every evolutionary processor is givenwith a finite set of one type of point mutations (an insertion, a deletion or a substitution of a symbol) which(More)