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Nonexpansiveness of metric projection
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)
Mathematics
Area of mathematics
Mathematical optimization
Convex set
Euclidean projection onto a convex set
2026-09-29
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The
metric
projection onto
a
nonempty closed
convex set
in
a
Hilbert space
is nonexpansive:
∥
Π
C
(
x
)
−
Π
C
(
y
)∥
≤
∥
x
−
y
∥
.
(1)
Ancestors
(6)
Euclidean projection onto a convex set
Convex set
Mathematical optimization
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2020
/
ii
/
Paper 4
/
30J
/
iii
/
Solution
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