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gptkb:Autoregressive_Integrated_Moving_Average_models
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ARIMA(p,d,q)
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gptkb:Systems_of_conservation_laws
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∂u/∂t + ∇·f(u) = 0
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gptkb:heat_equation
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∂u/∂t = α∇²u
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gptkb:Poisson's_equation_(inside_mass_distribution)
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∇²Φ = 4πGρ
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gptkb:Wilhelmy_equation
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F = γ P cosθ
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gptkb:exponential_growth_model
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N(t) = N_0 * e^{rt}
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gptkb:incompressible_Navier–Stokes_equations_in_3D
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∇·u = 0
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gptkb:Bidirectional_Reflectance_Distribution_Function
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function of four angles
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gptkb:geodesic_equation
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second-order differential equation
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gptkb:Analytic_signal
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x_a(t) = x(t) + i H[x(t)]
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gptkb:Pauli–Lubanski_pseudovector
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pseudovector
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gptkb:Dresselhaus_effect
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gptkb:Dresselhaus_Hamiltonian
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gptkb:Helmert_transformation
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gptkb:transformation
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gptkb:linear_Schrödinger_equation
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iħ ∂ψ/∂t = Ĥψ
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gptkb:paraxial_Helmholtz_equation
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∂²A/∂x² + ∂²A/∂y² - 2ik ∂A/∂z = 0
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gptkb:Laplace's_equation_(outside_mass_distribution)
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∇²Φ = 0
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gptkb:lattice_Hamiltonian
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sum of local terms over lattice sites
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gptkb:advection-diffusion_equation
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∂c/∂t + u·∇c = D∇²c
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gptkb:Bloch_functions
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Product of plane wave and periodic function
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gptkb:incompressible_Navier–Stokes_equations_in_3D
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∂u/∂t + (u·∇)u = -∇p/ρ + ν∇²u + f
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