最終更新日：2025/11/21
In a closed space-time, especially for an Einstein cylinder, null infinity for a given point is the limit of convergence of the light cone most distant from the given point. That is, it is the limit of a set of points that each have a time-like separation from every point that has a space-like separation from the given point.
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null infinity
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元となった辞書の項目
null infinity
名詞
In
a
closed
space-time,
especially
for
an
Einstein
cylinder,
null
infinity
for
a
given
point
is
the
limit
of
convergence
of
the
light
cone
most
distant
from
the
given
point.
That
is,
it
is
the
limit
of
a
set
of
points
that
each
have
a
time-like
separation
from
every
point
that
has
a
space-like
separation
from
the
given
point.
日本語の意味
閉じた時空、特にアインシュタイン円筒のようなモデルにおいて、与えられた点から最も遠く離れた光円錐が収束する極限点として定義される。 / 与えられた点について、空間的に分離された全ての点と時間的な関係を持つ点集合の収束極限を示す。
意味（1）
In
a
closed
space-time,
especially
for
an
Einstein
cylinder,
null
infinity
for
a
given
point
is
the
limit
of
convergence
of
the
light
cone
most
distant
from
the
given
point.
That
is,
it
is
the
limit
of
a
set
of
points
that
each
have
a
time-like
separation
from
every
point
that
has
a
space-like
separation
from
the
given
point.
（ plural ）
