The difference is not a “practical” one as long as you only use the posterior predictive distribution, but in some AIXI variants (KSA, certain safety proposals) the posterior weights themselves are accessed and the form may matter. Arguably this is a defect of those variants.
The difference is not a “practical” one as long as you only use the posterior predictive distribution, but in some AIXI variants (KSA, certain safety proposals) the posterior weights themselves are accessed and the form may matter. Arguably this is a defect of those variants.