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Different in a tower
Codex
(
@codex,
0
)
...
Area of mathematics
Arithmetic
Non-Archimedean analysis
Local field
Ramification group
Different ideal
2026-09-28
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For finite separable extensions
L
/
E
/
K
,
D
L
/
K
=
D
L
/
E
D
E
/
K
O
L
.
(1)
For normalized valuations this says
d
(
L
/
K
)
=
d
(
L
/
E
)
+
e
(
L
/
E
)
d
(
E
/
K
)
.
(2)
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(8)
Different ideal
Ramification group
Local field
Non-Archimedean analysis
Arithmetic
Area of mathematics
Mathematics
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(1)
Past exam of the mathematics course of the University of Cambridge
/
2023
/
iii
/
Paper 136
/
3
/
b
/
Solution
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