Physics and Computation
2009
September 7-11th 2009
Ponta-Delgada, Azores, Portugal
Main.JozefGruska History
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August 04, 2009, at 03:04 PM
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Faculty of informatics
Masaryk University
Brno, Czech Republik
Masaryk University
Brno, Czech Republik
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Faculty of informatics \\
Masaryk University \\
Brno, Czech Republik
Masaryk University \\
Brno, Czech Republik
August 04, 2009, at 03:04 PM
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!! Talk from Jozef Gruska
Faculty of informatics
Masaryk University
Brno, Czech Republik
!!! Title
Physics and informatics as two windows to see/explore the world(s)
!!! Abstract
In the first part of the talk a new perception of informatics, much nature
information processing motivated, is introduced and analysed. This new
perception see informatics as also bringing a new, third, fundamental
methodology for science and society.
In the second part of the talk physics and (new) informatics are analysed and
demonstrated, in several ways, as two windows to explore the world.
In the last part of the talk a new, informatics-based, methodology is
discussed in more details, especially the existing and potential impacts of
this methodology to physics and informatics itself. This new methodology may
be also a way to (start to) deal with some of the key problems of the
current science in a new way.
Faculty of informatics
Masaryk University
Brno, Czech Republik
!!! Title
Physics and informatics as two windows to see/explore the world(s)
!!! Abstract
In the first part of the talk a new perception of informatics, much nature
information processing motivated, is introduced and analysed. This new
perception see informatics as also bringing a new, third, fundamental
methodology for science and society.
In the second part of the talk physics and (new) informatics are analysed and
demonstrated, in several ways, as two windows to explore the world.
In the last part of the talk a new, informatics-based, methodology is
discussed in more details, especially the existing and potential impacts of
this methodology to physics and informatics itself. This new methodology may
be also a way to (start to) deal with some of the key problems of the
current science in a new way.
August 04, 2009, at 03:02 PM
by -
Deleted lines 0-27:
!! Talk from Mathieu Hoyrup
!!! Title
Dynamical systems: unpredictability vs incomputability.
!!! Abstract
The long-term forecasting of chaotic dynamical systems is generally
not possible, because of the so-called "sensitivity to initial
conditions": if you do not know exactly the initial state of a system,
you cannot predict its long-range evolution. For this reason, the
mathematical theory of dynamical systems is more focused on the
understanding of the global, asymptotic behaviour of dynamical systems
than the prediction of individual trajectories. In particular, several
notions of entropies of a system are defined in order to quantify its
unpredictability.
Computability theory provides another perspective on the problem of
unpredictability: a system is unpredictable if its evolution cannot be
computed by a machine. Unpredictability is then understood as
incomputability, or difficulty to compute.
I will present some works that connect these two approaches: the
classical one from the mathematical theory of dynamical systems, the
recursion-theoretic one using concepts from computability theory,
especially Kolmogorov complexity.
August 04, 2009, at 11:48 AM
by -
Added lines 1-28:
!! Talk from Mathieu Hoyrup
!!! Title
Dynamical systems: unpredictability vs incomputability.
!!! Abstract
The long-term forecasting of chaotic dynamical systems is generally
not possible, because of the so-called "sensitivity to initial
conditions": if you do not know exactly the initial state of a system,
you cannot predict its long-range evolution. For this reason, the
mathematical theory of dynamical systems is more focused on the
understanding of the global, asymptotic behaviour of dynamical systems
than the prediction of individual trajectories. In particular, several
notions of entropies of a system are defined in order to quantify its
unpredictability.
Computability theory provides another perspective on the problem of
unpredictability: a system is unpredictable if its evolution cannot be
computed by a machine. Unpredictability is then understood as
incomputability, or difficulty to compute.
I will present some works that connect these two approaches: the
classical one from the mathematical theory of dynamical systems, the
recursion-theoretic one using concepts from computability theory,
especially Kolmogorov complexity.