*Last updated: 2023-03-16.*
# Module: tf_quant_finance.math.pde.steppers.douglas_adi
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Douglas ADI method for solving multidimensional parabolic PDEs.
## Functions
[`douglas_adi_scheme(...)`](../../../../tf_quant_finance/math/pde/steppers/douglas_adi/douglas_adi_scheme.md): Applies Douglas time marching scheme (see [1] and Eq. 3.1 in [2]).
[`douglas_adi_step(...)`](../../../../tf_quant_finance/math/pde/steppers/douglas_adi/douglas_adi_step.md): Creates a stepper function with Crank-Nicolson time marching scheme.
[`multidim_parabolic_equation_step(...)`](../../../../tf_quant_finance/math/pde/steppers/douglas_adi/multidim_parabolic_equation_step.md): Performs one step in time to solve a multidimensional PDE.