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Utility theorems
absex
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Metamath Proof Explorer
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Theorem
absex
Description:
The absolute value function is a set.
(Contributed by
SN
, 5-Jun-2025)
Ref
Expression
Assertion
absex
⊢
abs
∈
V
Proof
Step
Hyp
Ref
Expression
1
absf
⊢
abs
:
ℂ
⟶
ℝ
2
cnex
⊢
ℂ
∈
V
3
reex
⊢
ℝ
∈
V
4
fex2
⊢
abs
:
ℂ
⟶
ℝ
∧
ℂ
∈
V
∧
ℝ
∈
V
→
abs
∈
V
5
1
2
3
4
mp3an
⊢
abs
∈
V