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V
n
A
n
m (m ) A
n
L
m
M
0
A
n
π = {M ∈ A
n
|
−−−→
M
0
M ∈ L
m
}.
m {M
0
, L
m
}
m π = {M
0
, L
m
} M
1
∈ π
{M
1
, L
m
} = {M
0
, L
m
} m π
L
m
M
0
M
M
1
M ∈ {M
1
, L
m
}⇐⇒
−−−→
M
1
M ∈
L
m
⇐⇒
−−−→
M
0
M
1
+
−−−→
M
1
M ∈ L
m
−−−→
M
0
M
1
∈
L
m
(V
n
, +) ⇐⇒
−−−→
M
0
M ∈ L
m
⇐⇒ M ∈ {M
0
, L
m
}
π = {M
0
, L
m
} m
(A
n
, V
n
, ψ) ψ
π
= ψ|π × π : π × π → V
n
.
ψ
π
(π × π) ⊂ L
m
ψ
π
: π × π → L
m
(π, L
m
, ψ
π
) m
A, B ∈ π =⇒
−−→
M
0
A,
−−−→
M
0
B ∈ L
m
=⇒
−→
AB =
−−−→
M
0
B −
−−→
M
0
A ∈ L
m
M
0
A
B
A ∈ π v ∈ L
m
1
◦
B ∈ A
n
−→
AB = v
−−−→
M
0
B =
−−→
M
0
A +
−→
AB ∈ L
m
=⇒ B ∈ π
1
◦
π 2
◦
π
A
n
π ⊂ A
n
L
m
⊂ V
n
(π, L
m
, ψ
π
)
m A
n
m
A
n
m
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