Description: "Reverse" second Peano postulate analogue for complex numbers: A complex number minus 1 is a complex number. (Contributed by Alexander van der Vekens, 18-Mar-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | peano2cnm | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn | |
|
2 | subcl | |
|
3 | 1 2 | mpan2 | |