The conference is concerned with the theory of computability
and complexity over real-valued data.
Computability and complexity theory are two central areas
of research in mathematical logic and theoretical computer
science. Computability theory is the study of the limitations
and abilities of computers in principle. Computational
complexity theory provides a framework for understanding the
cost of solving computational problems, as measured by the
requirement for resources such as time and space.
The classical approach in these areas is to consider
algorithms as operating on finite strings of symbols from a
finite alphabet. Such strings may represent various discrete
objects such as integers or algebraic expressions, but cannot
represent general real or complex numbers, unless they are
Most mathematical models in physics and engineering, however,
are based on the real number concept. Thus, a computability
theory and a complexity theory over the real numbers and over
more general continuous data structures is needed. Despite
remarkable progress in recent years many important fundamental
problems have not yet been studied, and presumably numerous
unexpected and surprising results are waiting to be detected.
Scientists working in the area of computation on real-valued
data come from different fields, such as theoretical computer
science, domain theory, logic, constructive mathematics,
computer arithmetic, numerical mathematics and all branches
of analysis. The conference provides a unique opportunity for
people from such diverse areas to meet, present work in progress
and exchange ideas and knowledge.
The topics of interest include foundational work on various
models and approaches for describing computability and
complexity over the real numbers. They also include
complexity-theoretic investigations, both foundational and
with respect to concrete problems, and new implementations of
exact real arithmetic, as well as further developments of
already existing software packages. We hope to gain new
insights into computability-theoretic aspects of various
computational questions from physics and from other fields
involving computations over the real numbers.
The registration fee for regular participants (those who attend the conference in person) is 50 Euro and it can be also paid at the IUC office upon arrival.
The registration fee for online participants is 25 Euro.
Authors are invited to submit 1-2 pages abstracts in PDF format,
including references via the following web page:
If full versions of papers are already available as technical report or arXiv version, then
corresponding links should be added to the reference list.
Final versions of abstracts might be distributed to participants in hardcopy and/or in
Submission deadline: August 9, 2023
Registration deadline: August 31, 2023 (online registration has no deadline)
Dubrovnik is connected by daily flights to many European destinations.
From Dubrovnik Airport you can take a
shuttle bus and it will transfer you to the Old Town of Dubrovnik.
The conference venue is only a few minutes walk away from the west gate of the Old Town (Pile gate).
CCA Steering Committee
Vasco Brattka, chair (Munich, Germany and Cape Town, South Africa),
Peter Hertling (Munich, Germany),
Akitoshi Kawamura (Kyoto, Japan),
Klaus Weihrauch (Hagen, Germany),
Ning Zhong (Cincinnati, USA),
Martin Ziegler (Daejeon, Republic of Korea)
For further information, please contact
Zvonko Iljazović, chair of the Organizing Committee,
(for local information)
Xizhong Zheng, chair of the Programme Committee,