元となった辞書の項目
real projective plane
名詞
(geometry)
A
three-dimensional
vector
space
over
the
field
of
real
numbers
in
which
one-dimensional
linear
subspaces
are
considered
as
“points”
and
two-dimensional
linear
subspaces
are
considered
as
“lines”.
Equivalently,
a
sphere
in
which
pairs
of
antipodal
points
are
considered
as
“points”
and
great
circles
are
considered
as
“lines”.
日本語の意味
実射影平面：実数体上の3次元ベクトル空間において、1次元の線形部分空間を「点」、2次元の線形部分空間を「直線」として扱う幾何学的対象。 / 実射影平面：球面上において、反対称な（対向する）点を1つの点として、また大円を直線として扱う幾何学的構造。
意味（1）
(geometry)
A
three-dimensional
vector
space
over
the
field
of
real
numbers
in
which
one-dimensional
linear
subspaces
are
considered
as
“points”
and
two-dimensional
linear
subspaces
are
considered
as
“lines”.
Equivalently,
a
sphere
in
which
pairs
of
antipodal
points
are
considered
as
“points”
and
great
circles
are
considered
as
“lines”.
（ plural ）
