{"artifact_id":"L1-370","layer":"L1","title":"Stellar Structure Inverse Problem","domain":"Astrophysics","sub_domain":"Stellar physics","physics_fingerprint":{"L_DAG":3.0,"title":"Stellar Structure Inverse Problem","domain":"Astrophysics","carrier":"N/A","primitives":["S.helioseismic.kernel","O.rnla.inversion","D.time"],"sub_domain":"Stellar physics","noise_model":"observation_gaussian","problem_class":"parameter_estimation","solution_space":"1D_stellar_profile","difficulty_delta":3,"integration_axis":"radial","sensing_mechanism":"stellar_oscillation_inversion"},"observable_profile":{"metric":"sound_speed_inversion_chi2","regime":"Existence of the recovered 1D_stellar_profile is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by declared priors. Stability is conditionally stable (kappa_eff ~= 50); surface_term_offset dominates the stability cliff; the remaining mismatch parameters contribute higher-order bias terms. Observation gaussian sets the irreducible data-fidelity floor.","secondary":"density_profile_RMSE"},"size_tiers":{"center_spec":{"omega":{"N_modes":200,"mass_Msun":1.0,"metallicity_Z":0.02,"noise_sigma_microHz":0.1},"input_format":"measurement_only","problem_class":"parameter_estimation","forward_operator":"stellar_oscillation_inversion","epsilon_fn_center":"1.2 sound_speed_inversion_chi2"},"omega_bounds":{"N_modes":[20,1000],"mass_Msun":[0.5,2.0],"metallicity_Z":[0.001,0.05],"noise_sigma_microHz":[0.01,1.0]},"epsilon_bounds":{"sound_speed_inversion_chi2":[0.8,3.0]},"allowed_problem_classes":["parameter_estimation"],"allowed_omega_dimensions":["N_modes","mass_Msun","metallicity_Z","noise_sigma_microHz"],"allowed_forward_operators":["stellar_oscillation_inversion"]},"hardness_fn":{"type":"epsilon_fn","delta":3,"kappa":1000.0,"metric":"sound_speed_inversion_chi2"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xffd57bfc88bee31c965a9647a73d78e9ebbf054029f9b88c52055e1e9d941207","chain_tx_hash":"0xe71800b693887c668fa41382d57492941a4b92db66fefb2c231e6145aab73f9d","chain_block":41555177}