Database
BASIC REAL AND COMPLEX ANALYSIS
Derivatives
Real and complex differentiation
Derivatives of functions of one complex or real variable
dvfcn
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dvreslem
Metamath Proof Explorer
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Theorem
dvfcn
Description:
The derivative is a function.
(Contributed by
Mario Carneiro
, 9-Feb-2015)
Ref
Expression
Assertion
dvfcn
⊢
F
ℂ
′
:
dom
⁡
F
ℂ
′
⟶
ℂ
Proof
Step
Hyp
Ref
Expression
1
cnelprrecn
⊢
ℂ
∈
ℝ
ℂ
2
dvfg
⊢
ℂ
∈
ℝ
ℂ
→
F
ℂ
′
:
dom
⁡
F
ℂ
′
⟶
ℂ
3
1
2
ax-mp
⊢
F
ℂ
′
:
dom
⁡
F
ℂ
′
⟶
ℂ