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Subgradient of the absolute value
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Mathematics
Area of mathematics
Analysis
Real analysis
Convex function
Subgradient
2026-09-24
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The
absolute value function
has
∂
∣
x
∣
=
{
{
sgn
x
}
,
[
−
1
,
1
]
,
x
=
0
,
x
=
0.
(1)
Ancestors
(7)
Subgradient
Convex function
Real analysis
Analysis
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 205
/
2
/
c
/
Solution
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