Database
REAL AND COMPLEX NUMBERS
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Positive reals (as a subset of complex numbers)
rpxr
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rpcn
Metamath Proof Explorer
Ascii
Structured
Theorem
rpxr
Description:
A positive real is an extended real.
(Contributed by
Mario Carneiro
, 21-Aug-2015)
Ref
Expression
Assertion
rpxr
⊢
(
𝐴
∈ ℝ
+
→
𝐴
∈ ℝ
*
)
Proof
Step
Hyp
Ref
Expression
1
rpre
⊢
(
𝐴
∈ ℝ
+
→
𝐴
∈ ℝ )
2
1
rexrd
⊢
(
𝐴
∈ ℝ
+
→
𝐴
∈ ℝ
*
)