WIP: add fixed-step RKV87-IIa (not yet working) #2693
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| alg_order(::RKV87) = 8 # primary solution order | ||
| embedded_order(::RKV87) = 7 # will matter once adaptivity is added | ||
| isfsal(::RKV87) = false # pair is NOT FSAL | ||
| has_dense_output(::RKV87)= false # we haven’t wired the interpolant yet |
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that's not a trait, also it has a fallback to linear.
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| # ------------------------------------------------------------------ | ||
| # Cache for Verner RKV87-IIa (13 stage values + 1 work vector) | ||
| # ------------------------------------------------------------------ | ||
| @cache RKV87ConstantCache begin | ||
| k1::K ; k2::K ; k3::K ; k4::K ; k5::K ; k6::K ; k7::K | ||
| k8::K ; k9::K ; k10::K ; k11::K ; k12::K ; k13::K | ||
| tmp::K # work vector for low-storage kernel | ||
| end |
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You're missing the alg_cache dispatches and the definition of the working cache.
| perform_step!(integrator, | ||
| cache::RKV87ConstantCache, | ||
| tab::ExplicitRKTableau{13}) = | ||
| verner_lowstorage_step!(integrator, cache, tab) |
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This function doesn't exist? Is this outputted by an LLM?
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This PR adds the Verner 8/7 (RKV87-IIa) method following issue #2621.
It compiles without errors, but RKV87 doesn’t show up in the REPL and I haven’t gotten the test to pass yet.
Would appreciate help debugging what’s missing — I suspect it’s not being registered properly.
@ChrisRackauckas