{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AAYHTL67RRDQ5CDKYDRZJ2SZV7","short_pith_number":"pith:AAYHTL67","canonical_record":{"source":{"id":"1211.2168","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-09T16:04:10Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"1561853b34295fc6cc5b03378fe00cb85466d72252594d3d9c2fa27dfbed07b6","abstract_canon_sha256":"ced3ae862bd7d11f70494d3b25d1baf5e382a1bffdcd89a5bc28d281e829f6ad"},"schema_version":"1.0"},"canonical_sha256":"003079afdf8c470e886ac0e394ea59afd0702e3909e3812456fe94025a34f0e8","source":{"kind":"arxiv","id":"1211.2168","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2168","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2168v2","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2168","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"pith_short_12","alias_value":"AAYHTL67RRDQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AAYHTL67RRDQ5CDK","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AAYHTL67","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AAYHTL67RRDQ5CDKYDRZJ2SZV7","target":"record","payload":{"canonical_record":{"source":{"id":"1211.2168","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-09T16:04:10Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"1561853b34295fc6cc5b03378fe00cb85466d72252594d3d9c2fa27dfbed07b6","abstract_canon_sha256":"ced3ae862bd7d11f70494d3b25d1baf5e382a1bffdcd89a5bc28d281e829f6ad"},"schema_version":"1.0"},"canonical_sha256":"003079afdf8c470e886ac0e394ea59afd0702e3909e3812456fe94025a34f0e8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:57.888882Z","signature_b64":"Ja+dth8GRdMn4jTwn3uxniC9N5uGE9acIizc3ks8XfXVYoetliLf7dCC6sBfe8d6xRTK7OqsOvgVBsJgKR7EDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"003079afdf8c470e886ac0e394ea59afd0702e3909e3812456fe94025a34f0e8","last_reissued_at":"2026-05-18T03:36:57.888465Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:57.888465Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.2168","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:36:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a2ha3z8IAwRSA+Oxm4qOIeHCIIMSSHj0Pa/Q7698vGGMhsim+p3SlT4n3xyci9GRF93oG4PVCOkpQvs0emugCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:28:20.343674Z"},"content_sha256":"1b3cc8548f2e8a814acf18e2ea5a645a2e1d7a4e973458957fd189bb4c45ecf6","schema_version":"1.0","event_id":"sha256:1b3cc8548f2e8a814acf18e2ea5a645a2e1d7a4e973458957fd189bb4c45ecf6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AAYHTL67RRDQ5CDKYDRZJ2SZV7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Can a marginally open universe amplify magnetic fields?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.CO","authors_text":"Varun Sahni, Yuri Shtanov","submitted_at":"2012-11-09T16:04:10Z","abstract_excerpt":"In a series of recent papers, including arXiv:1210.1183, it was claimed that large-scale magnetic fields generated during inflation in a spatially open universe could remain astrophysically significant at the present time since they experienced superadiabatic amplification specific to an open universe. We reexamine this assertion and show that, on the contrary, large-scale magnetic fields in a realistic open universe decay in much the same manner as they would in a spatially flat universe. Consequently, their amplitude today is extremely small (B0 < 10^{-59} G) and is unlikely to be of astroph"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2168","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:36:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xpcZVL/bfr03phj1ma+72+WZ1SAHKRmoJ5ubzKE7mdbyfiQ5o13VI4D0Ol4wfE/UTPzGOsrk3e0Qvk2+A0HZAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:28:20.344052Z"},"content_sha256":"172017fde573d94fc65627c3f2b35dc68b91fd10c916edd8e0c6ee50ad81237f","schema_version":"1.0","event_id":"sha256:172017fde573d94fc65627c3f2b35dc68b91fd10c916edd8e0c6ee50ad81237f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/bundle.json","state_url":"https://pith.science/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T06:28:20Z","links":{"resolver":"https://pith.science/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7","bundle":"https://pith.science/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/bundle.json","state":"https://pith.science/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AAYHTL67RRDQ5CDKYDRZJ2SZV7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AAYHTL67RRDQ5CDKYDRZJ2SZV7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"ced3ae862bd7d11f70494d3b25d1baf5e382a1bffdcd89a5bc28d281e829f6ad","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-09T16:04:10Z","title_canon_sha256":"1561853b34295fc6cc5b03378fe00cb85466d72252594d3d9c2fa27dfbed07b6"},"schema_version":"1.0","source":{"id":"1211.2168","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2168","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2168v2","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2168","created_at":"2026-05-18T03:36:57Z"},{"alias_kind":"pith_short_12","alias_value":"AAYHTL67RRDQ","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AAYHTL67RRDQ5CDK","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AAYHTL67","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:172017fde573d94fc65627c3f2b35dc68b91fd10c916edd8e0c6ee50ad81237f","target":"graph","created_at":"2026-05-18T03:36:57Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"In a series of recent papers, including arXiv:1210.1183, it was claimed that large-scale magnetic fields generated during inflation in a spatially open universe could remain astrophysically significant at the present time since they experienced superadiabatic amplification specific to an open universe. We reexamine this assertion and show that, on the contrary, large-scale magnetic fields in a realistic open universe decay in much the same manner as they would in a spatially flat universe. Consequently, their amplitude today is extremely small (B0 < 10^{-59} G) and is unlikely to be of astroph","authors_text":"Varun Sahni, Yuri Shtanov","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-09T16:04:10Z","title":"Can a marginally open universe amplify magnetic fields?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2168","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:1b3cc8548f2e8a814acf18e2ea5a645a2e1d7a4e973458957fd189bb4c45ecf6","target":"record","created_at":"2026-05-18T03:36:57Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"ced3ae862bd7d11f70494d3b25d1baf5e382a1bffdcd89a5bc28d281e829f6ad","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-09T16:04:10Z","title_canon_sha256":"1561853b34295fc6cc5b03378fe00cb85466d72252594d3d9c2fa27dfbed07b6"},"schema_version":"1.0","source":{"id":"1211.2168","kind":"arxiv","version":2}},"canonical_sha256":"003079afdf8c470e886ac0e394ea59afd0702e3909e3812456fe94025a34f0e8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"003079afdf8c470e886ac0e394ea59afd0702e3909e3812456fe94025a34f0e8","first_computed_at":"2026-05-18T03:36:57.888465Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:36:57.888465Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ja+dth8GRdMn4jTwn3uxniC9N5uGE9acIizc3ks8XfXVYoetliLf7dCC6sBfe8d6xRTK7OqsOvgVBsJgKR7EDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:36:57.888882Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.2168","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b3cc8548f2e8a814acf18e2ea5a645a2e1d7a4e973458957fd189bb4c45ecf6","sha256:172017fde573d94fc65627c3f2b35dc68b91fd10c916edd8e0c6ee50ad81237f"],"state_sha256":"633aec415b70abcac9f328e6680a386575c39f97922a371446d984c13eb42f2c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f+Qlu62EXf0CQKDNDjYMalWnrcDjnL2Ug5yxHb+MvcCe3wvd/HTx6vg6IN+9B/C3/7I2jfXB0poUZh1m/IDTDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:28:20.346716Z","bundle_sha256":"9352acd456efd312d57d5a433863809808469b2f3e37c77fc97f509956207518"}}