Database
REAL AND COMPLEX NUMBERS
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Positive reals (as a subset of complex numbers)
rpcnne0
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rpcndif0
Metamath Proof Explorer
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Unicode
Theorem
rpcnne0
Description:
A positive real is a nonzero complex number.
(Contributed by
NM
, 11-Nov-2008)
Ref
Expression
Assertion
rpcnne0
⊢
A
∈
ℝ
+
→
A
∈
ℂ
∧
A
≠
0
Proof
Step
Hyp
Ref
Expression
1
rpcn
⊢
A
∈
ℝ
+
→
A
∈
ℂ
2
rpne0
⊢
A
∈
ℝ
+
→
A
≠
0
3
1
2
jca
⊢
A
∈
ℝ
+
→
A
∈
ℂ
∧
A
≠
0