for the transparent disk (5.22) arises this way from the spanning tree shown in (C.33):
Γ
0
i
v
0
i
(C.35)
We are now going to show that
ϕ
D
(Γ) =
ϕ
D
(Γ
0
i
). It is enough to assume that
E
0
has precisely
two elements. In this case the statement is implied by the following result:
Lemma C.10.
The natural isomorphisms between block functors that are indicated in the
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- Fall '17
