Description: Define an algebraic integer as a complex number which is the root of a monic integer polynomial. (Contributed by Stefan O'Rear, 30-Nov-2014)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | df-za | |- _ZZ = ( IntgOver ` ZZ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 0 | cza | |- _ZZ |
|
| 1 | citgo | |- IntgOver |
|
| 2 | cz | |- ZZ |
|
| 3 | 2 1 | cfv | |- ( IntgOver ` ZZ ) |
| 4 | 0 3 | wceq | |- _ZZ = ( IntgOver ` ZZ ) |