{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1996:RJUBPM3KY5V76XBQQWVVADSXO7","short_pith_number":"pith:RJUBPM3K","canonical_record":{"source":{"id":"cond-mat/9607164","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1996-07-23T17:00:42Z","cross_cats_sorted":[],"title_canon_sha256":"8a4209690625f3e35a5905dc15d5ac9225eced2b9b2fd85d43fefa5cf74cf00f","abstract_canon_sha256":"bdf6983c7ad89476795f5d2941a8eee466804e1af32fb875fe566cec1a9eff84"},"schema_version":"1.0"},"canonical_sha256":"8a6817b36ac76bff5c3085ab500e5777e919f0485cb6649374f8b7102fbc13fe","source":{"kind":"arxiv","id":"cond-mat/9607164","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9607164","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9607164v1","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9607164","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"pith_short_12","alias_value":"RJUBPM3KY5V7","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"RJUBPM3KY5V76XBQ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"RJUBPM3K","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1996:RJUBPM3KY5V76XBQQWVVADSXO7","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9607164","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat","submitted_at":"1996-07-23T17:00:42Z","cross_cats_sorted":[],"title_canon_sha256":"8a4209690625f3e35a5905dc15d5ac9225eced2b9b2fd85d43fefa5cf74cf00f","abstract_canon_sha256":"bdf6983c7ad89476795f5d2941a8eee466804e1af32fb875fe566cec1a9eff84"},"schema_version":"1.0"},"canonical_sha256":"8a6817b36ac76bff5c3085ab500e5777e919f0485cb6649374f8b7102fbc13fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:39:34.125237Z","signature_b64":"RusArR0/oxaPzah/1pQOXsqd5APcGkpIM3T0BFL6VLG+eYdnT4UU5EMzJxgrm/iri/ya5MPan3xRBvki2xWwAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a6817b36ac76bff5c3085ab500e5777e919f0485cb6649374f8b7102fbc13fe","last_reissued_at":"2026-05-18T01:39:34.124493Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:39:34.124493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9607164","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":"2026-05-18T01:39:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97qw5p9/7UgbIl3p2qqbqXJmC5jpSrzDk+LFvof/01L2AZ7mV4L3rl/Md1PC6/31OOrtwzuHg4JIdwfBY9A7CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T20:42:31.711374Z"},"content_sha256":"a10d4e8ba67c305ac32b20204878be0f748f09d9eec1815128c2f1b97edcbb91","schema_version":"1.0","event_id":"sha256:a10d4e8ba67c305ac32b20204878be0f748f09d9eec1815128c2f1b97edcbb91"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1996:RJUBPM3KY5V76XBQQWVVADSXO7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effective Field Theory of ideal-fluid Hydrodynamics","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat","authors_text":"Adriaan M. J. Schakel","submitted_at":"1996-07-23T17:00:42Z","abstract_excerpt":"Starting from a standard description of an ideal, isentropic fluid, we derive the effective theory governing a gapless non-relativistic mode---the sound mode. The theory, which is dictated by the requirement of Galilei invariance, entails the entire set of hydrodynamic equations. The gaplessness of the sound mode is explained by identifying it as the Goldstone mode associated with the spontaneous breakdown of Galilei invariance. Differences with a superfluid are pointed out."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9607164","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":"2026-05-18T01:39:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R09wELl70oGdI6YNzlYKr7040POGUx2qfTikwX/kPpqYTpLdh7c2gMVn2g3zwsraXv5fYcgXHHkTSHwGHezqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T20:42:31.711723Z"},"content_sha256":"5b3eb00d21c0bce64d003f8e2f9202da23ad901a2c0a46abc006debe6789733f","schema_version":"1.0","event_id":"sha256:5b3eb00d21c0bce64d003f8e2f9202da23ad901a2c0a46abc006debe6789733f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RJUBPM3KY5V76XBQQWVVADSXO7/bundle.json","state_url":"https://pith.science/pith/RJUBPM3KY5V76XBQQWVVADSXO7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RJUBPM3KY5V76XBQQWVVADSXO7/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":"2026-07-02T20:42:31Z","links":{"resolver":"https://pith.science/pith/RJUBPM3KY5V76XBQQWVVADSXO7","bundle":"https://pith.science/pith/RJUBPM3KY5V76XBQQWVVADSXO7/bundle.json","state":"https://pith.science/pith/RJUBPM3KY5V76XBQQWVVADSXO7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RJUBPM3KY5V76XBQQWVVADSXO7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1996:RJUBPM3KY5V76XBQQWVVADSXO7","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":"bdf6983c7ad89476795f5d2941a8eee466804e1af32fb875fe566cec1a9eff84","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1996-07-23T17:00:42Z","title_canon_sha256":"8a4209690625f3e35a5905dc15d5ac9225eced2b9b2fd85d43fefa5cf74cf00f"},"schema_version":"1.0","source":{"id":"cond-mat/9607164","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9607164","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9607164v1","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9607164","created_at":"2026-05-18T01:39:34Z"},{"alias_kind":"pith_short_12","alias_value":"RJUBPM3KY5V7","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"RJUBPM3KY5V76XBQ","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"RJUBPM3K","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:5b3eb00d21c0bce64d003f8e2f9202da23ad901a2c0a46abc006debe6789733f","target":"graph","created_at":"2026-05-18T01:39:34Z","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":"Starting from a standard description of an ideal, isentropic fluid, we derive the effective theory governing a gapless non-relativistic mode---the sound mode. The theory, which is dictated by the requirement of Galilei invariance, entails the entire set of hydrodynamic equations. The gaplessness of the sound mode is explained by identifying it as the Goldstone mode associated with the spontaneous breakdown of Galilei invariance. Differences with a superfluid are pointed out.","authors_text":"Adriaan M. J. Schakel","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat","submitted_at":"1996-07-23T17:00:42Z","title":"Effective Field Theory of ideal-fluid Hydrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9607164","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:a10d4e8ba67c305ac32b20204878be0f748f09d9eec1815128c2f1b97edcbb91","target":"record","created_at":"2026-05-18T01:39:34Z","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":"bdf6983c7ad89476795f5d2941a8eee466804e1af32fb875fe566cec1a9eff84","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat","submitted_at":"1996-07-23T17:00:42Z","title_canon_sha256":"8a4209690625f3e35a5905dc15d5ac9225eced2b9b2fd85d43fefa5cf74cf00f"},"schema_version":"1.0","source":{"id":"cond-mat/9607164","kind":"arxiv","version":1}},"canonical_sha256":"8a6817b36ac76bff5c3085ab500e5777e919f0485cb6649374f8b7102fbc13fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a6817b36ac76bff5c3085ab500e5777e919f0485cb6649374f8b7102fbc13fe","first_computed_at":"2026-05-18T01:39:34.124493Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:39:34.124493Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RusArR0/oxaPzah/1pQOXsqd5APcGkpIM3T0BFL6VLG+eYdnT4UU5EMzJxgrm/iri/ya5MPan3xRBvki2xWwAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:39:34.125237Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9607164","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a10d4e8ba67c305ac32b20204878be0f748f09d9eec1815128c2f1b97edcbb91","sha256:5b3eb00d21c0bce64d003f8e2f9202da23ad901a2c0a46abc006debe6789733f"],"state_sha256":"82d3bf5ccac7a8efe3c8c671ca01b89ea35655e45c95798968ca129893384571"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pvrjSI8lMGIlXFEBHY0NuA0brOgsoTuWGk7QivYrYzk1a+3jY3+nYn4i+49Xoa5LRrDNQum+rm4nQV6o9JQNCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T20:42:31.713638Z","bundle_sha256":"e42efbf83cdc7d02b33d3404c72d9c4a2342ac65a24e9b1b7d46fbe9bfd855f7"}}