Database
REAL AND COMPLEX NUMBERS
Real and complex numbers - basic operations
Division
div1i
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eqnegi
Metamath Proof Explorer
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Theorem
div1i
Description:
A number divided by 1 is itself.
(Contributed by
NM
, 9-Jan-2002)
Ref
Expression
Hypothesis
divclz.1
⊢
A
∈
ℂ
Assertion
div1i
⊢
A
1
=
A
Proof
Step
Hyp
Ref
Expression
1
divclz.1
⊢
A
∈
ℂ
2
div1
⊢
A
∈
ℂ
→
A
1
=
A
3
1
2
ax-mp
⊢
A
1
=
A