Express/SOS 2026 - Second Call for Papers

Anna Philippou <[email protected]> Thu, 21 May 2026 12:45:40 +0300
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[Apologies for multiple postings]

=======================

SECOND CALL FOR PAPERS - EXPRESS/SOS 2026

Combined 33rd International Workshop on Expressiveness in Concurrency
and 23rd Workshop on Structural Operational Semantics (Express/SOS 2026)

September 5, 2026, Liverpool, UK
Affiliated with CONFEST 2026

https://expresssos.github.io/conf/2026

========================

IMPORTANT DATES (AoE)

- Paper Submission: June 22, 2026
- Notification: July 25, 2026
- Workshop: September 5, 2026
- Final version (post-proceedings): October 25, 2026

========================

SCOPE AND TOPICS

The Express/SOS workshop series aims to bring together researchers 
interested in the formal semantics of systems and programming concepts, 
and in the expressiveness of computational models.

Topics of interest for Express/SOS 2026 include, but are not limited to:
- expressiveness and rigorous comparisons between models of computation 
(process algebras, event structures, Petri nets, rewrite systems);
- expressiveness and rigorous comparisons between programming languages 
and models (distributed, component-based, object-oriented, 
service-oriented);
- logics for concurrency (modal logics, probabilistic and stochastic 
logics, temporal logics and resource logics);
- analysis techniques for concurrent systems;
- theory of structural operational semantics (meta-theory, 
category-theoretic approaches, congruence results);
- comparisons between structural operational semantics and other formal 
semantic approaches;
- applications and case studies of structural operational semantics;
- software tools that automate, or are based on, structural operational 
semantics.

We especially welcome contributions bridging the gap between the above 
topics and neighbouring areas, including:
- computer security
- multi-agent systems
- programming languages
- formal verification
- reversible computation
- knowledge representation

========================

INVITED SPEAKERS

TBA

========================

SUBMISSION GUIDELINES

We invite two types of submissions:

- Full papers (up to 15 pages, excluding references)
- Short papers (up to 5 pages, excluding references, not to be included 
in the workshop post-proceedings)

All submissions must adhere to the EPTCS format (https://info.eptcs.org/).
Simultaneous submission to journals, conferences, or other workshops is 
only allowed for short papers; full papers must be unpublished.

Submission is performed through EasyChair:
https://easychair.org/conferences/?conf=expresssos2026

========================

PROCEEDINGS

The final versions of accepted full papers will be published in EPTCS.
For each accepted paper, at least one of the co-authors must register 
and present the work at the workshop.

* We are planning a Joint Special Issue with Express/SOS 2025 (due in 
December 2026).

========================

WORKSHOP CO-CHAIRS

- Giorgio Bacci (University of Aalborg, Denmark)
- Anna Philippou (University of Cyprus, Cyprus)

========================

PROGRAM COMMITTEE

- Henning Basold (LIACS, Leiden University, NL)
- Giovanni Bernardi (Université Paris Diderot - IRIF, FR)
- Marco Bernardo (University of Urbino, IT)
- Chiara Bodei (University of Pisa, IT)
- Johannes Borgström (Uppsala University, SE)
- Georgiana Caltais (University of Twente, NL)
- Pedro R. D'Argenio (Universidad Nacional de Córdoba - CONICET, AR)
- Emanuele D'Osualdo (University of Konstanz, DE)
- Fatemeh Ghassemi (University of Tehran, IR)
- David N. Jansen (Institute of Software, Chinese Academy of Sciences, CN)
- Vasileios Koutavas (Trinity College Dublin, IE)
- Dimitrios Kouzapas (University of Cyprus, CY)
- Doriana Medić (University of Turin, IT)
- Luca Padovani (University of Bologna, IT)
- Jovanka Pantovic (University of Novi Sad, RS)
- Marco Peressotti (University of Southern Denmark, DK)
- Jorge A. Pérez (University of Groningen, NL)
- Tatjana Petrov (University of Trieste, IT)
- Emilio Tuosto (Gran Sasso Science Institute, IT)

========================

CONTACT

For inquiries, please contact the co-chairs:
[email protected]
[email protected]

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          <div class="moz-text-flowed" style="font-family: -moz-fixed; font-size: 12px;" lang="x-unicode"> [Apologies for multiple postings] <br>
            <br>
            ======================= <br>
            <br>
            SECOND CALL FOR PAPERS - EXPRESS/SOS 2026 <br>
            <br>
            Combined 33rd International Workshop on Expressiveness in
            Concurrency <br>
            and 23rd Workshop on Structural Operational Semantics
            (Express/SOS 2026) <br>
            <br>
            September 5, 2026,&nbsp;Liverpool, UK <br>
            Affiliated with CONFEST 2026 <br>
            <br>
            <a class="moz-txt-link-freetext" href="https://expresssos.github.io/conf/2026" moz-do-not-send="true">https://expresssos.github.io/conf/2026</a>
            <br>
            <br>
            ======================== <br>
            <br>
            IMPORTANT DATES (AoE) <br>
            <br>
            - Paper Submission: June 22, 2026 <br>
            - Notification: July 25, 2026 <br>
            - Workshop: September 5, 2026 <br>
            - Final version (post-proceedings): October 25, 2026 <br>
            <br>
            ======================== <br>
            <br>
            SCOPE AND TOPICS <br>
            <br>
            The Express/SOS workshop series aims to bring together
            researchers interested in the formal semantics of systems
            and programming concepts, and in the expressiveness of
            computational models. <br>
            <br>
            Topics of interest for Express/SOS 2026 include, but are not
            limited to:&nbsp;<br>
            - expressiveness and rigorous comparisons between models of
            computation (process algebras, event structures, Petri nets,
            rewrite systems); <br>
            - expressiveness and rigorous comparisons between
            programming languages and models (distributed,
            component-based, object-oriented, service-oriented); <br>
            - logics for concurrency (modal logics, probabilistic and
            stochastic logics, temporal logics and resource logics); <br>
            - analysis techniques for concurrent systems; <br>
            - theory of structural operational semantics (meta-theory,
            category-theoretic approaches, congruence results); <br>
            - comparisons between structural operational semantics and
            other formal semantic approaches; <br>
            - applications and case studies of structural operational
            semantics; <br>
            - software tools that automate, or are based on, structural
            operational semantics. <br>
            <br>
            We especially welcome contributions bridging the gap between
            the above topics and neighbouring areas, including:</div>
          <div class="moz-text-flowed" style="font-family: -moz-fixed; font-size: 12px;" lang="x-unicode">- computer security <br>
            - multi-agent systems <br>
            - programming languages <br>
            - formal verification <br>
            - reversible computation <br>
            - knowledge representation <br>
            <br>
            ======================== <br>
            <br>
            INVITED SPEAKERS <br>
            <br>
            TBA <br>
            <br>
            ======================== <br>
            <br>
            SUBMISSION GUIDELINES <br>
            <br>
            We invite two types of submissions: <br>
            <br>
            - Full papers (up to 15 pages, excluding references) <br>
            - Short papers (up to 5 pages, excluding references, not to
            be included in the workshop post-proceedings) <br>
            <br>
            All submissions must adhere to the EPTCS format (<a class="moz-txt-link-freetext" href="https://info.eptcs.org/" moz-do-not-send="true">https://info.eptcs.org/</a>).
            <br>
            Simultaneous submission to journals, conferences, or other
            workshops is only allowed for short papers; full papers must
            be unpublished. <br>
            <br>
            Submission is performed through EasyChair: <br>
            <a class="moz-txt-link-freetext" href="https://easychair.org/conferences/?conf=expresssos2026" moz-do-not-send="true">https://easychair.org/conferences/?conf=expresssos2026</a>
            <br>
            <br>
            ======================== <br>
            <br>
            PROCEEDINGS <br>
            <br>
            The final versions of accepted full papers will be published
            in EPTCS. <br>
            For each accepted paper, at least one of the co-authors must
            register and present the work at the workshop. <br>
            <br>
            * We are planning a Joint Special Issue with Express/SOS
            2025 (due in December 2026). <br>
            <br>
            ======================== <br>
            <br>
            WORKSHOP CO-CHAIRS <br>
            <br>
            - Giorgio Bacci (University of Aalborg, Denmark) <br>
            - Anna Philippou (University of Cyprus, Cyprus) <br>
            <br>
            ======================== <br>
            <br>
            PROGRAM COMMITTEE <br>
            <br>
            - Henning Basold (LIACS, Leiden University, NL) <br>
            - Giovanni Bernardi (Université Paris Diderot - IRIF, FR) <br>
            - Marco Bernardo (University of Urbino, IT) <br>
            - Chiara Bodei (University of Pisa, IT) <br>
            - Johannes Borgström (Uppsala University, SE) <br>
            - Georgiana Caltais (University of Twente, NL) <br>
            - Pedro R. D'Argenio (Universidad Nacional de Córdoba -
            CONICET, AR) <br>
            - Emanuele D'Osualdo (University of Konstanz, DE) <br>
            - Fatemeh Ghassemi (University of Tehran, IR) <br>
            - David N. Jansen (Institute of Software, Chinese Academy of
            Sciences, CN) <br>
            - Vasileios Koutavas (Trinity College Dublin, IE) <br>
            - Dimitrios Kouzapas (University of Cyprus, CY) <br>
            - Doriana Medić (University of Turin, IT) <br>
            - Luca Padovani (University of Bologna, IT) <br>
            - Jovanka Pantovic (University of Novi Sad, RS) <br>
            - Marco Peressotti (University of Southern Denmark, DK)&nbsp;<br>
            - Jorge A. Pérez (University of Groningen, NL)</div>
          <div class="moz-text-flowed" style="font-family: -moz-fixed; font-size: 12px;" lang="x-unicode">- Tatjana Petrov (University of Trieste,
            IT)&nbsp;<br>
            - Emilio Tuosto (Gran Sasso Science Institute, IT) <br>
            <br>
            ======================== <br>
            <br>
            CONTACT <br>
            <br>
            For inquiries, please contact the co-chairs: <br>
            <a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:[email protected]" moz-do-not-send="true">[email protected]</a>
            <br>
            <a class="moz-txt-link-abbreviated moz-txt-link-freetext" href="mailto:[email protected]" moz-do-not-send="true">[email protected]</a>
            <br>
            <br>
          </div>
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