{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:Y25JI7WYO7GBIXMQDGG2FY36XR","short_pith_number":"pith:Y25JI7WY","canonical_record":{"source":{"id":"1204.4142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2012-04-18T17:13:07Z","cross_cats_sorted":[],"title_canon_sha256":"e13ff47db95a211ea9b2c6f4d06787561ccf3d94eefe0056b975542ab70aa961","abstract_canon_sha256":"e9cb1b3d11770789328813e8d50a3a1dbcddbbed010297819ea80db88150caa7"},"schema_version":"1.0"},"canonical_sha256":"c6ba947ed877cc145d90198da2e37ebc41844f8953d48ca8aaa52897662846e9","source":{"kind":"arxiv","id":"1204.4142","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4142","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4142v1","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4142","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"pith_short_12","alias_value":"Y25JI7WYO7GB","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"Y25JI7WYO7GBIXMQ","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"Y25JI7WY","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:Y25JI7WYO7GBIXMQDGG2FY36XR","target":"record","payload":{"canonical_record":{"source":{"id":"1204.4142","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2012-04-18T17:13:07Z","cross_cats_sorted":[],"title_canon_sha256":"e13ff47db95a211ea9b2c6f4d06787561ccf3d94eefe0056b975542ab70aa961","abstract_canon_sha256":"e9cb1b3d11770789328813e8d50a3a1dbcddbbed010297819ea80db88150caa7"},"schema_version":"1.0"},"canonical_sha256":"c6ba947ed877cc145d90198da2e37ebc41844f8953d48ca8aaa52897662846e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:57:49.233478Z","signature_b64":"7HB3T6oY7UzlRCY66JcyhqgPgCALJsgk2uSm+/hDSnRn4ntqfjdYzbCWpy/ZW4B1qS2lZ84Ucu4X3apI4PLqBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c6ba947ed877cc145d90198da2e37ebc41844f8953d48ca8aaa52897662846e9","last_reissued_at":"2026-05-18T01:57:49.232740Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:57:49.232740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.4142","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":"2026-05-18T01:57:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vEmIsULu4jDJQDpswoNVSSz+D/c/8DUXjejsIg7fc4Z+Gne4Y7buUPiriZhYLOr42FyNMZUnyp0ThbGnPQyEBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T23:48:51.675557Z"},"content_sha256":"c84f408552d46e34830ae7df0308f5a0bb1b1489cfc8f3733d939a2f5806b3d7","schema_version":"1.0","event_id":"sha256:c84f408552d46e34830ae7df0308f5a0bb1b1489cfc8f3733d939a2f5806b3d7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:Y25JI7WYO7GBIXMQDGG2FY36XR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comments on \"Translation-invariant bipolarons and the problem of high-temperature superconductivity\"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"J. T. Devreese, S. N. Klimin","submitted_at":"2012-04-18T17:13:07Z","abstract_excerpt":"We comment on the recent results of Refs. [1, 2] on the bipolaron problem derived using an approximation of Gross - Tulub. It is proved that, contrary to the claim made in Refs. [1, 2], the bipolaron ground state energy calculated there in the strong-coupling approximation has not been shown to constitute a variational upper bound."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4142","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":"2026-05-18T01:57:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/7afMKIY4AQ7onu99oX6Lshk3FwWssMC/01ieuLX3nLajRxetpK3v0hd5pDPScFvgvVkm2gL7F3ookxovV4DCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T23:48:51.675902Z"},"content_sha256":"d8470c65bfca77e5cf4de13bb28aeef0414351dab51aca208f01a83baebab092","schema_version":"1.0","event_id":"sha256:d8470c65bfca77e5cf4de13bb28aeef0414351dab51aca208f01a83baebab092"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/bundle.json","state_url":"https://pith.science/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/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":"2026-06-01T23:48:51Z","links":{"resolver":"https://pith.science/pith/Y25JI7WYO7GBIXMQDGG2FY36XR","bundle":"https://pith.science/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/bundle.json","state":"https://pith.science/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Y25JI7WYO7GBIXMQDGG2FY36XR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:Y25JI7WYO7GBIXMQDGG2FY36XR","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":"e9cb1b3d11770789328813e8d50a3a1dbcddbbed010297819ea80db88150caa7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2012-04-18T17:13:07Z","title_canon_sha256":"e13ff47db95a211ea9b2c6f4d06787561ccf3d94eefe0056b975542ab70aa961"},"schema_version":"1.0","source":{"id":"1204.4142","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.4142","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"arxiv_version","alias_value":"1204.4142v1","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.4142","created_at":"2026-05-18T01:57:49Z"},{"alias_kind":"pith_short_12","alias_value":"Y25JI7WYO7GB","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"Y25JI7WYO7GBIXMQ","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"Y25JI7WY","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:d8470c65bfca77e5cf4de13bb28aeef0414351dab51aca208f01a83baebab092","target":"graph","created_at":"2026-05-18T01:57:49Z","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":"We comment on the recent results of Refs. [1, 2] on the bipolaron problem derived using an approximation of Gross - Tulub. It is proved that, contrary to the claim made in Refs. [1, 2], the bipolaron ground state energy calculated there in the strong-coupling approximation has not been shown to constitute a variational upper bound.","authors_text":"J. T. Devreese, S. N. Klimin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2012-04-18T17:13:07Z","title":"Comments on \"Translation-invariant bipolarons and the problem of high-temperature superconductivity\""},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.4142","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:c84f408552d46e34830ae7df0308f5a0bb1b1489cfc8f3733d939a2f5806b3d7","target":"record","created_at":"2026-05-18T01:57:49Z","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":"e9cb1b3d11770789328813e8d50a3a1dbcddbbed010297819ea80db88150caa7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2012-04-18T17:13:07Z","title_canon_sha256":"e13ff47db95a211ea9b2c6f4d06787561ccf3d94eefe0056b975542ab70aa961"},"schema_version":"1.0","source":{"id":"1204.4142","kind":"arxiv","version":1}},"canonical_sha256":"c6ba947ed877cc145d90198da2e37ebc41844f8953d48ca8aaa52897662846e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6ba947ed877cc145d90198da2e37ebc41844f8953d48ca8aaa52897662846e9","first_computed_at":"2026-05-18T01:57:49.232740Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:57:49.232740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7HB3T6oY7UzlRCY66JcyhqgPgCALJsgk2uSm+/hDSnRn4ntqfjdYzbCWpy/ZW4B1qS2lZ84Ucu4X3apI4PLqBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:57:49.233478Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.4142","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c84f408552d46e34830ae7df0308f5a0bb1b1489cfc8f3733d939a2f5806b3d7","sha256:d8470c65bfca77e5cf4de13bb28aeef0414351dab51aca208f01a83baebab092"],"state_sha256":"f1f55e73b134734603b21e522cf7d9e1be450bd52cff9d65a67962061e1c2adf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gxkMQHXNtd+hgpL6qG68smK4UQCQ7AGeX27H+bPca9N+p3ix3XDqVYIXazV4GHa2+ZN4jhyqC0ANUqbk92hLBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T23:48:51.677826Z","bundle_sha256":"dcb69bf152bed991f88bac30e1609d2a4a1fdeedafd0fa118dad330692499dee"}}