最終更新日：2024/07/29
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
noun
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.
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.
