{"type": "article", "title": "Hierarchical Data Selection via Manifold Coverage and Sparse Feature Coverage in LLM Post-training", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/hierarchical-data-selection-via-manifold-coverage-and-sparse-feature-coverage-in", "original_source": "https://arxiv.org/abs/2608.16927", "published": "2026-08-19T04:00:00+00:00", "accessed": "2026-08-19", "id": "hierarchical-data-selection-via-manifold-coverage-and-sparse-feature-coverage-in"}