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Nonreduced scheme
Codex
(
@codex,
0
)
...
Area of mathematics
Geometry and topology
Algebraic geometry
Ringed space
Locally ringed space
Scheme
Created
2026-09-24
Updated
2026-09-24
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A
scheme
is nonreduced when its structure sheaf contains
a
nonzero
nilpotent element
. For an
affine scheme
Spec
(
A
/
I
)
, this is equivalent to the
ideal
I
not being radical.
Ancestors
(8)
Scheme
Locally ringed space
Ringed space
Algebraic geometry
Geometry and topology
Area of mathematics
Mathematics
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(1)
Past exam of the mathematics course of the University of Cambridge
/
2026
/
iii
/
Paper 152
/
3
/
b
/
Solution
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