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Graphs, reactive systems and mobile ambients

Graphs, reactive systems and mobile ambients. Supervisor: F. Gadducci. Giacoma Valentina Monreale. Sound and complete w.r.t. the structural congruence of MAs. Graphical encoding for MAs. Syntax: P:= 0 , n[P], M.P, ( n)P, P 1 |P 2 M:= in n, out n, open n . ambient name. process.

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Graphs, reactive systems and mobile ambients

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  1. Graphs, reactive systems and mobile ambients Supervisor: F. Gadducci Giacoma Valentina Monreale

  2. Sound and complete w.r.t. the structural congruence of MAs Graphical encoding for MAs Syntax: P:= 0, n[P], M.P, ( n)P, P1|P2 M:= in n, out n, open n ambient name process activation point n[P] cap n.P ambb cap (n)(n[in m.0]|m[out m.0]) a ambb inb m p ambb out

  3. Graph trasformation systems for MAs Graphs trasformation rules Reduction Semantics n[P]|open n.Q P|Q n[in m.P|Q]|m[R] m[n[P|Q]|R] m[n[out m.P|Q]|R] n[P|Q]|m[R]

  4. LTS on graphs by the BC technique We derive a LTS on graphs by applying the borrowed context technique, which is an instance of the theory of reactive systems JFK -|m[X] G J H K n[in m.0] m[n[0]|X]

  5. LTS for MAs The bisimilarity on the distilled LTS is too strict We propose notions of strong and weak barbed saturated semantics for LTS synthesized using the theory of reactive systems

  6. (Weak) Barbed Semi-Saturated Bisimilarity Barbs are predicates over the states of a system: Po if P satisfies o Weak barbs: Po if P P’ and P’o • Definition. A symmetric relation R is a • bisimulationif whenever P R Q then • ∀ C[−], if C[P]↓o then C[Q] o; • if P P′ then C[Q] Q′ and P′ R Q′. barbed semi-saturated weak barbed semi-saturated ↓ if P↓o then Q↓o if P↓o then Q⇓o ⇓ C[-] * • Weak barbed semi-saturated bisimilarity∼WBSS is the largest weak barbed semi-saturated bisimulation. Barbed semi-saturated bisimilarity∼BSS is the largest barbed semi-saturated bisimulation. (Weak) Barbed saturated bisimilarity for MAs coincides with (weak)strong reduction barbed congruence

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