{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:A5WRHIEQVORSMLVDEWH4ZLICFL","short_pith_number":"pith:A5WRHIEQ","canonical_record":{"source":{"id":"1210.1913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2012-10-06T05:43:05Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"4e22047dd7e1859973614769ba08cf57094d8aca1545a54ef7511468e8e76d84","abstract_canon_sha256":"46dee76e4f1b2f3b79b6b01d5036ca581f0e85c4f6ebb8af8cc791ce9d77f99f"},"schema_version":"1.0"},"canonical_sha256":"076d13a090aba3262ea3258fccad022ad9df8aa998984269fafd7f80f493ea7e","source":{"kind":"arxiv","id":"1210.1913","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.1913","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"arxiv_version","alias_value":"1210.1913v1","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.1913","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"pith_short_12","alias_value":"A5WRHIEQVORS","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"A5WRHIEQVORSMLVD","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"A5WRHIEQ","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:A5WRHIEQVORSMLVDEWH4ZLICFL","target":"record","payload":{"canonical_record":{"source":{"id":"1210.1913","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2012-10-06T05:43:05Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"4e22047dd7e1859973614769ba08cf57094d8aca1545a54ef7511468e8e76d84","abstract_canon_sha256":"46dee76e4f1b2f3b79b6b01d5036ca581f0e85c4f6ebb8af8cc791ce9d77f99f"},"schema_version":"1.0"},"canonical_sha256":"076d13a090aba3262ea3258fccad022ad9df8aa998984269fafd7f80f493ea7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:21.959165Z","signature_b64":"uLZurE83H1E8cEKnwX9GGsaywhEPbCHfSoBp6t0rBB5xrW/bzoUDwMLRhNO0PB4HYtTnI9ZryuYqe4h77c0KAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"076d13a090aba3262ea3258fccad022ad9df8aa998984269fafd7f80f493ea7e","last_reissued_at":"2026-05-18T03:11:21.958380Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:21.958380Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.1913","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":"2026-05-18T03:11:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZzwfmGU1uIX+pxEq5cQTxh157ztjNMd7m+zevVGs481+aCesPDtRxMFxZRHQamVhAKeYp62eStu7cHiXBxPOCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:59:33.142662Z"},"content_sha256":"4f3445105ca73a52518ba9ff9db214feda10e20352e9c63c2e952ab5e694c5b9","schema_version":"1.0","event_id":"sha256:4f3445105ca73a52518ba9ff9db214feda10e20352e9c63c2e952ab5e694c5b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:A5WRHIEQVORSMLVDEWH4ZLICFL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hidden force opposing ice compression","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft"],"primary_cat":"physics.chem-ph","authors_text":"Chang Q Sun, Weitao Zheng, Xi Zhang","submitted_at":"2012-10-06T05:43:05Z","abstract_excerpt":"Coulomb repulsion between the unevenly-bound bonding and nonbonding electron pairs in the O:H-O hydrogen-bond is shown to originate the anomalies of ice under compression. Consistency between experimental observations, density functional theory and molecular dynamics calculations confirmed that the resultant force of the compression, the repulsion, and the recovery of electron-pair dislocations differentiates ice from other materials in response to pressure. The compression shortens and strengthens the longer-and-softer intermolecular O:H lone-pair virtual-bond; the repulsion pushes the bondin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.1913","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":"2026-05-18T03:11:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qx93X95zjbIqCbZERw33RqRaP2tjz5K6QLe2/EpXM5UlOgSJOYo/sOhhp0io8CMDYjgyQHuBcgihjuFxphpMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:59:33.143571Z"},"content_sha256":"4db30fa044141ec32b44bbb5b5643838fa9ddd27eb5b0e480631b35a9ba19fc1","schema_version":"1.0","event_id":"sha256:4db30fa044141ec32b44bbb5b5643838fa9ddd27eb5b0e480631b35a9ba19fc1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/bundle.json","state_url":"https://pith.science/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/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":"2026-05-31T10:59:33Z","links":{"resolver":"https://pith.science/pith/A5WRHIEQVORSMLVDEWH4ZLICFL","bundle":"https://pith.science/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/bundle.json","state":"https://pith.science/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A5WRHIEQVORSMLVDEWH4ZLICFL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:A5WRHIEQVORSMLVDEWH4ZLICFL","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":"46dee76e4f1b2f3b79b6b01d5036ca581f0e85c4f6ebb8af8cc791ce9d77f99f","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2012-10-06T05:43:05Z","title_canon_sha256":"4e22047dd7e1859973614769ba08cf57094d8aca1545a54ef7511468e8e76d84"},"schema_version":"1.0","source":{"id":"1210.1913","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.1913","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"arxiv_version","alias_value":"1210.1913v1","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.1913","created_at":"2026-05-18T03:11:21Z"},{"alias_kind":"pith_short_12","alias_value":"A5WRHIEQVORS","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"A5WRHIEQVORSMLVD","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"A5WRHIEQ","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:4db30fa044141ec32b44bbb5b5643838fa9ddd27eb5b0e480631b35a9ba19fc1","target":"graph","created_at":"2026-05-18T03:11:21Z","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":"Coulomb repulsion between the unevenly-bound bonding and nonbonding electron pairs in the O:H-O hydrogen-bond is shown to originate the anomalies of ice under compression. Consistency between experimental observations, density functional theory and molecular dynamics calculations confirmed that the resultant force of the compression, the repulsion, and the recovery of electron-pair dislocations differentiates ice from other materials in response to pressure. The compression shortens and strengthens the longer-and-softer intermolecular O:H lone-pair virtual-bond; the repulsion pushes the bondin","authors_text":"Chang Q Sun, Weitao Zheng, Xi Zhang","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2012-10-06T05:43:05Z","title":"Hidden force opposing ice compression"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.1913","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":"sha256:4f3445105ca73a52518ba9ff9db214feda10e20352e9c63c2e952ab5e694c5b9","target":"record","created_at":"2026-05-18T03:11:21Z","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":"46dee76e4f1b2f3b79b6b01d5036ca581f0e85c4f6ebb8af8cc791ce9d77f99f","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2012-10-06T05:43:05Z","title_canon_sha256":"4e22047dd7e1859973614769ba08cf57094d8aca1545a54ef7511468e8e76d84"},"schema_version":"1.0","source":{"id":"1210.1913","kind":"arxiv","version":1}},"canonical_sha256":"076d13a090aba3262ea3258fccad022ad9df8aa998984269fafd7f80f493ea7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"076d13a090aba3262ea3258fccad022ad9df8aa998984269fafd7f80f493ea7e","first_computed_at":"2026-05-18T03:11:21.958380Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:11:21.958380Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uLZurE83H1E8cEKnwX9GGsaywhEPbCHfSoBp6t0rBB5xrW/bzoUDwMLRhNO0PB4HYtTnI9ZryuYqe4h77c0KAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:11:21.959165Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.1913","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4f3445105ca73a52518ba9ff9db214feda10e20352e9c63c2e952ab5e694c5b9","sha256:4db30fa044141ec32b44bbb5b5643838fa9ddd27eb5b0e480631b35a9ba19fc1"],"state_sha256":"4377874f9c980a28abe67485d79ca68a3bce666609a8997e494f1e5a36c365d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xY5EzRheFbkU5fD9RZ+jfkvSfyaYqp3dKeWKsnHNwd2CE4nySFsFj0CH7VBvi5vyfhWMkKxHYVcRQlV3u2hdDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:59:33.151817Z","bundle_sha256":"7932b00ffb1bbff98bd68f6e7435bef8cba49431cf7b50b6b0d551f53da85bbd"}}