Last Updated：2025/12/07
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Although not considered an absolute law, the principle of least action often guides physicists in predicting how systems—from subatomic particles to whole ecosystems—evolve along paths that minimize action.
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Although not considered an absolute law, the principle of least action often guides physicists in predicting how systems—from subatomic particles to whole ecosystems—evolve along paths that minimize action.
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Related words
principle of least action
Noun
uncountable
(physics)
also
known
as
the
stationary
action
principle.
In
complex
systems,
the
tendency
for
any
movement
or
change
to
use
the
least
action,
and
therefore
amount
of
energy
possible.
This
is
true
on
a
subatomic
level,
on
the
population
level
(evolution),
and
on
a
macro
level.
Not
considered
a
law
of
physics
because
it
is
not
true
100%
of
the
time.
Japanese Meaning
最小作用の原理：物理学において、あらゆる動きや変化が可能な限り作用やエネルギー消費を最小限に抑えようとする傾向を示す原理。サブ原子レベルから集団（進化）レベル、マクロな現象にまで及ぶが、常に成り立つわけではなく、厳密な物理法則とはみなされない。
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