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REAL AND COMPLEX NUMBERS
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Positive reals (as a subset of complex numbers)
rpgt0
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rpge0
Metamath Proof Explorer
Ascii
Structured
Theorem
rpgt0
Description:
A positive real is greater than zero.
(Contributed by
FL
, 27-Dec-2007)
Ref
Expression
Assertion
rpgt0
⊢
(
𝐴
∈ ℝ
+
→ 0 <
𝐴
)
Proof
Step
Hyp
Ref
Expression
1
elrp
⊢
(
𝐴
∈ ℝ
+
↔ (
𝐴
∈ ℝ ∧ 0 <
𝐴
) )
2
1
simprbi
⊢
(
𝐴
∈ ℝ
+
→ 0 <
𝐴
)