Description: An odd Goldbach number is odd. (Contributed by AV, 26-Jul-2020)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | gboodd | ⊢ ( 𝑍 ∈ GoldbachOdd → 𝑍 ∈ Odd ) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | gbogbow | ⊢ ( 𝑍 ∈ GoldbachOdd → 𝑍 ∈ GoldbachOddW ) | |
| 2 | gbowodd | ⊢ ( 𝑍 ∈ GoldbachOddW → 𝑍 ∈ Odd ) | |
| 3 | 1 2 | syl | ⊢ ( 𝑍 ∈ GoldbachOdd → 𝑍 ∈ Odd ) |