The operational history of the Hesoolver 2-6-4 left a lasting legacy in locomotive design. It influenced subsequent developments in steam locomotive technology, particularly in the adoption of the 2-6-4 wheel arrangement for a variety of applications.
Hesoolver 2-6-4 specifically evolved as a follow-up iteration improving stability and convergence compared with earlier versions. The versioning indicates a design lineage where the first digit denotes the core algorithmic paradigm (2 = hybrid local-global), the second digit denotes the population-control strategy (6 = six-tiered population management), and the third digit denotes the constraint-handling and refinement strategy (4 = fourth-generation smoothing and penalty balancing). Hesoolver 2-6-4
If you are looking for a specific algorithm sheet labeled "Hesoolver 2-6-4," it is possible you are confusing it with: The operational history of the Hesoolver 2-6-4 left