{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BE6DTCAFNM4URQPVDD2BAIRVX5","short_pith_number":"pith:BE6DTCAF","canonical_record":{"source":{"id":"1803.10526","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-28T11:07:55Z","cross_cats_sorted":[],"title_canon_sha256":"28ed2e545216d2c2b749b1227ade6ae7d5d56c6928d6c79347e002c6060e3ccf","abstract_canon_sha256":"f73ca92f346e1b7e719a5750e1762d2fabfeba1a07d1044f4712b14560c4193c"},"schema_version":"1.0"},"canonical_sha256":"093c3988056b3948c1f518f4102235bf603a0117c675916501c5670f03d33682","source":{"kind":"arxiv","id":"1803.10526","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10526","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10526v1","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10526","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"pith_short_12","alias_value":"BE6DTCAFNM4U","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BE6DTCAFNM4URQPV","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BE6DTCAF","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BE6DTCAFNM4URQPVDD2BAIRVX5","target":"record","payload":{"canonical_record":{"source":{"id":"1803.10526","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-28T11:07:55Z","cross_cats_sorted":[],"title_canon_sha256":"28ed2e545216d2c2b749b1227ade6ae7d5d56c6928d6c79347e002c6060e3ccf","abstract_canon_sha256":"f73ca92f346e1b7e719a5750e1762d2fabfeba1a07d1044f4712b14560c4193c"},"schema_version":"1.0"},"canonical_sha256":"093c3988056b3948c1f518f4102235bf603a0117c675916501c5670f03d33682","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:09.406592Z","signature_b64":"kwIrvFAhKe0fT6Ud0Gl+bJYbYpEEokLSsFZ+BlzxfEF+J0KHWv4AbQQXuRqc000jsUCQpdSPnoBypCWKFrNnCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"093c3988056b3948c1f518f4102235bf603a0117c675916501c5670f03d33682","last_reissued_at":"2026-05-17T23:59:09.406059Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:09.406059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.10526","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mjdft8rAtfWV5O12yQ1KODOm0kJTb0nHObWewJHnlid5X3thHQy528B196xFe9aGa04nFcjNAK2OuWXDFaw3Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T14:46:54.893496Z"},"content_sha256":"a4b6ce799a72d2d3dc5cec8d56f1598d79ac600033f67ab4f277bb370dbe7514","schema_version":"1.0","event_id":"sha256:a4b6ce799a72d2d3dc5cec8d56f1598d79ac600033f67ab4f277bb370dbe7514"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BE6DTCAFNM4URQPVDD2BAIRVX5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A brief overview of planet formation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Philip J. Armitage","submitted_at":"2018-03-28T11:07:55Z","abstract_excerpt":"The initial conditions, physics, and outcome of planet formation are now constrained by detailed observations of protoplanetary disks, laboratory experiments, and the discovery of thousands of extrasolar planetary systems. These developments have broadened the range of processes that are considered important in planet formation, to include disk turbulence, radial drift, planet migration, and pervasive post-formation dynamical evolution. The N-body collisional growth of planetesimals and protoplanets, and the physics of planetary envelopes - key ingredients of the classical model - remain centr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10526","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:59:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SH0wDJJHftDEgrNjuXYked+ASDmtOcaRiySqTZWiNnHpw3e8jc71QcgYxWJAg1wNvslsaiHQESz2U5j5KY8YBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T14:46:54.893903Z"},"content_sha256":"9aeccad1539836d094e6c87d33270f670301589e2377d4076ca073bdd88ec962","schema_version":"1.0","event_id":"sha256:9aeccad1539836d094e6c87d33270f670301589e2377d4076ca073bdd88ec962"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/bundle.json","state_url":"https://pith.science/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/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":"2026-06-04T14:46:54Z","links":{"resolver":"https://pith.science/pith/BE6DTCAFNM4URQPVDD2BAIRVX5","bundle":"https://pith.science/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/bundle.json","state":"https://pith.science/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BE6DTCAFNM4URQPVDD2BAIRVX5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BE6DTCAFNM4URQPVDD2BAIRVX5","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":"f73ca92f346e1b7e719a5750e1762d2fabfeba1a07d1044f4712b14560c4193c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-28T11:07:55Z","title_canon_sha256":"28ed2e545216d2c2b749b1227ade6ae7d5d56c6928d6c79347e002c6060e3ccf"},"schema_version":"1.0","source":{"id":"1803.10526","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.10526","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"arxiv_version","alias_value":"1803.10526v1","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.10526","created_at":"2026-05-17T23:59:09Z"},{"alias_kind":"pith_short_12","alias_value":"BE6DTCAFNM4U","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BE6DTCAFNM4URQPV","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BE6DTCAF","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:9aeccad1539836d094e6c87d33270f670301589e2377d4076ca073bdd88ec962","target":"graph","created_at":"2026-05-17T23:59:09Z","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":"The initial conditions, physics, and outcome of planet formation are now constrained by detailed observations of protoplanetary disks, laboratory experiments, and the discovery of thousands of extrasolar planetary systems. These developments have broadened the range of processes that are considered important in planet formation, to include disk turbulence, radial drift, planet migration, and pervasive post-formation dynamical evolution. The N-body collisional growth of planetesimals and protoplanets, and the physics of planetary envelopes - key ingredients of the classical model - remain centr","authors_text":"Philip J. Armitage","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-28T11:07:55Z","title":"A brief overview of planet formation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.10526","kind":"arxiv","version":1},"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:a4b6ce799a72d2d3dc5cec8d56f1598d79ac600033f67ab4f277bb370dbe7514","target":"record","created_at":"2026-05-17T23:59:09Z","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":"f73ca92f346e1b7e719a5750e1762d2fabfeba1a07d1044f4712b14560c4193c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-03-28T11:07:55Z","title_canon_sha256":"28ed2e545216d2c2b749b1227ade6ae7d5d56c6928d6c79347e002c6060e3ccf"},"schema_version":"1.0","source":{"id":"1803.10526","kind":"arxiv","version":1}},"canonical_sha256":"093c3988056b3948c1f518f4102235bf603a0117c675916501c5670f03d33682","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"093c3988056b3948c1f518f4102235bf603a0117c675916501c5670f03d33682","first_computed_at":"2026-05-17T23:59:09.406059Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:09.406059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kwIrvFAhKe0fT6Ud0Gl+bJYbYpEEokLSsFZ+BlzxfEF+J0KHWv4AbQQXuRqc000jsUCQpdSPnoBypCWKFrNnCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:09.406592Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.10526","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a4b6ce799a72d2d3dc5cec8d56f1598d79ac600033f67ab4f277bb370dbe7514","sha256:9aeccad1539836d094e6c87d33270f670301589e2377d4076ca073bdd88ec962"],"state_sha256":"1a74df6fe7151fb15bdd52069cbfeb38a036074a4fb5b1c5313f620d04215c43"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"swtKbdKR5XCYG0wl8uMqw+V2fL6E2zqQJrdII2s0+yo134oW2FppJsbJk/RCUfUdagxC/zduNkHEQfKNe1b5Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T14:46:54.895928Z","bundle_sha256":"e0eb3f0dfd7ccf579f1ec2a2959b85f01a6f8c09600faceebc0e67abcaa514ff"}}