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| 1: Σ ← 1Y/(|K|1X) ; 𝒯 ← 1X/(|K|1Y ) |
| 2: θ ← 1 ; n ← 0 |
| 3: INITIALIZE x0 and y0 to zero |
| 4: x̄0 ← x0 |
| 5: REPEAT |
| 6: yn+1 ← proxΣ[F*](yn + ΣKx̄n) |
| 7: xn+1 ← prox𝒯 [G](xn − 𝒯 K⊤yn+1] |
| 8: x̄n+1 ← xn+1 + θ(xn+1 − xn) |
| 9: n ← n + 1 |
| 10: UNTIL the convergence conditions are satisfied |
| 11: OUTPUT: image fconv ← fn+1 |
