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complex projective line
noun
(analytic
geometry,
projective
geometry)
A
complex
line
(especially,
the
set
of
complex
numbers
regarded
as
such)
endowed
with
a
point
at
infinity
(thus
becoming
a
projective
line);
(more
formally)
the
set
of
equivalence
classes
of
ordered
pairs
(α,
β)
of
complex
numbers,
not
both
zero,
with
respect
to
the
equivalence
relation
"(α,
β)
≡
(λα,
λβ)
for
all
nonzero
complex
λ".
real projective plane
noun
(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”.
final year project
noun
collaborative project management
noun
social project management
noun
project evaluation review technique
project evaluation and review technique
projectionist
noun
projectionless
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