Parameters
Activity density: --
DP Universality Class
p_c ≈ 0.6447 (1D DP)
Near p_c:
ρ ~ (p−p_c)^β, β≈0.276
ξ_⊥ ~ |p−p_c|^{-ν_⊥}, ν_⊥≈1.097
ξ_∥ ~ |p−p_c|^{-ν_∥}, ν_∥≈1.734
Colored = active
Black = absorbed forever
Near p_c:
ρ ~ (p−p_c)^β, β≈0.276
ξ_⊥ ~ |p−p_c|^{-ν_⊥}, ν_⊥≈1.097
ξ_∥ ~ |p−p_c|^{-ν_∥}, ν_∥≈1.734
Colored = active
Black = absorbed forever
Key Physics
DP class: any model with a single absorbing state + no conservation law. Epidemics, turbulence onset, neural avalanches all belong to this class (Janssen-Grassberger conjecture).