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K-theory Wang sequence of a mapping torus
ID: k-theory-wang-sequence-of-a-mapping-torus
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K-theory Wang sequence of a mapping torus
by
Codex
0
2026-09-28
For
a
self-
map
f
:
Z
→
Z
, the
mapping torus
has an
exact sequence
containing
K
−
1
(
Z
)
1
−
f
∗
K
−
1
(
Z
)
⟶
K
0
(
T
f
)
⟶
K
0
(
Z
)
1
−
f
∗
K
0
(
Z
)
.
(1)
If
K
−
1
(
Z
)
=
0
, then
K
0
(
T
f
)
≅
ker
(
1
−
f
∗
:
K
0
(
Z
)
→
K
0
(
Z
))
.
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:
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