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The word χάος did not mean "disorder" in classical-period ancient Greece. It meant "the primal emptiness, space". ''Chaos'' is derived from the Proto-Indo-European root ''ghn'' or ''ghen'' meaning "gape, be wide open": [[compare]] "chasm" (from Ancient Greek χάσμα, a cleft, slit or gap), and Anglo-Saxon ''gānian'' ("yawn"), ''geanian, ginian'' ("gape wide"); see also Old Norse Ginnungagap. Due to people misunderstanding early Christian uses of the word, the [[meaning]] of the word changed to "disorder". (The Ancient Greek for "disorder" is ''ταραχή'').

The word χάος did not mean "disorder" in classical-period ancient Greece. It meant "the primal emptiness, space". ''Chaos'' is derived from the Proto-Indo-European root ''ghn'' or ''ghen'' meaning "gape, be wide open": [[compare]] "chasm" (from Ancient Greek χάσμα, a cleft, slit or gap), and Anglo-Saxon ''gānian'' ("yawn"), ''geanian, ginian'' ("gape wide"); see also Old Norse Ginnungagap. Due to people misunderstanding early Christian uses of the word, the [[meaning]] of the word changed to "disorder". (The Ancient Greek for "disorder" is ''ταραχή'').

<center>For lessons on the [[topic]] of '''''Chaos''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Chaos '''''this link'''''].</center>

<center>For lessons on the [[topic]] of '''''Chaos''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Chaos '''''this link'''''].</center>

==Scientific and mathematical chaos==

==Scientific and mathematical chaos==

Mathematically, ''chaos'' means an aperiodic deterministic [[behavior]] which is very [[sensitive]] to its initial conditions, i.e., infinitesimal perturbations of initial conditions for a chaotic system lead to large variations of the [[orbit]] in the phase [[space]].

Mathematically, ''chaos'' means an aperiodic deterministic [[behavior]] which is very [[sensitive]] to its initial conditions, i.e., infinitesimal perturbations of initial conditions for a chaotic system lead to large variations of the [[orbit]] in the phase [[space]].

Chaotic systems are systems that look [[random]] but aren't. They are actually deterministic systems (predictable if you have enough [[information]]) governed by physical [[law]]s, that are very difficult to predict accurately (a commonly used example is [[weather]] forecasting).

Chaotic systems are systems that look [[random]] but aren't. They are actually deterministic systems (predictable if you have enough [[information]]) governed by physical [[law]]s, that are very difficult to predict accurately (a commonly used example is [[weather]] forecasting).

Furthermore, the word ''gas'' is probably an alteration of ''chaos''. [[Particles]] in gases exhibit chaotic [[motion]], although this was [[unknown]] to [http://en.wikipedia.org/wiki/Jan_Baptist_van_Helmont Jan Baptist van Helmont], the inventor of the term. He is instead believed to have been [[influenced]] by the concept of chaos in the [[occult]] theories of [http://en.wikipedia.org/wiki/Paracelsus Paracelsus].

Furthermore, the word ''gas'' is probably an alteration of ''chaos''. [[Particles]] in gases exhibit chaotic [[motion]], although this was [[unknown]] to [https://en.wikipedia.org/wiki/Jan_Baptist_van_Helmont Jan Baptist van Helmont], the inventor of the term. He is instead believed to have been [[influenced]] by the concept of chaos in the [[occult]] theories of [https://en.wikipedia.org/wiki/Paracelsus Paracelsus].

[[Category: Philosophy]]

[[Category: Philosophy]]

[[Category: Mathematics]]

[[Category: Mathematics]]