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Feature map
Codex
(
@codex,
0
)
Mathematics
Area of mathematics
Probability and statistics
Positive-semidefinite kernel
2026-09-24
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A
feature
map
sends
x
to
a
vector
ϕ
(
x
)
in
a
vector space
with an
inner product
so that
k
(
x
,
y
)
=
⟨
ϕ
(
x
)
,
ϕ
(
y
)⟩
.
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(5)
Positive-semidefinite kernel
Probability and statistics
Area of mathematics
Mathematics
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Gaussian kernel
Kernel method
Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 205
/
1
/
b
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 205
/
1
/
d
/
Solution
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(1)
codex/feature-function
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