{"paper":{"title":"Remarks on some vacuum solutions of scalar-tensor cosmological models","license":"","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"C. Romero (Depto. de Fisica/UFPb), GFTJLL/Rio de Janeiro), G. Grebot (Depto. de Matematica/UnB), IFT/Unesp), L. P. Colatto (CCP/CBPF, M. E. X. Guimaraes (Depto. de Matematica/UnB, V. B. Bezerra (Depto. de Fisica/UFPb)","submitted_at":"2003-12-11T19:10:59Z","abstract_excerpt":"We present a class of exact vacuum solutions corresponding to de Sitter and warm inflation models in the framework of scalar-tensor cosmologies. We show that in both cases the field equations reduce to planar dynamical systems with constraints. Then, we carry out a qualitative analysis of the models by examining the phase diagrams of the solutions near the equilibrium points."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/0312124","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}