Sznajd Opinion Dynamics
Aligned pairs persuade neighbors — consensus, fragmentation, and noise thresholds
Rule: if si=si+1, then si-1=si=si+1=si+2
With noise η: flip opinion with probability η | 2D: aligned square convinces all 6 neighbors
Magnetization m = (N₊−N₋)/N → ±1 (consensus) or 0 (fragmentation)