| Intuitionistic Logic Explorer | 
      
      
      < Previous  
      Next >
      
       Nearby theorems  | 
  ||
| Mirrors > Home > ILE Home > Th. List > eqcomd | GIF version | ||
| Description: Deduction from commutative law for class equality. (Contributed by NM, 15-Aug-1994.) | 
| Ref | Expression | 
|---|---|
| eqcomd.1 | ⊢ (𝜑 → 𝐴 = 𝐵) | 
| Ref | Expression | 
|---|---|
| eqcomd | ⊢ (𝜑 → 𝐵 = 𝐴) | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | eqcomd.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | eqcom 2198 | . 2 ⊢ (𝐴 = 𝐵 ↔ 𝐵 = 𝐴) | |
| 3 | 1, 2 | sylib 122 | 1 ⊢ (𝜑 → 𝐵 = 𝐴) | 
| Copyright terms: Public domain | W3C validator |