Integreat`RK`
Integreat`RK`

RKDJReducibleQ

RKDJReducibleQ[rk]

returns True if rk has unused stages and False, otherwise.

Details and Options

  • RKDJReducibleQ takes into account whether a stage is used by the embedded and dense output solution.

Examples

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Basic Examples  (2)

Check if a method is reducible:

The classical fourth order Runge–Kutta method is DJ-irreducible:

Possible Issues  (1)

This tableau may appear reducible, but with the dense output, all stages are used:

Tech Notes
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  • Runge–Kutta Methods