{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:U3UAZERSHZU7HBPVDL2SITR44O","short_pith_number":"pith:U3UAZERS","canonical_record":{"source":{"id":"1309.5571","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-09-22T06:37:23Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"1c75e3dce9a9fe69df868f2b559ca35027a73170397d28607a8c39cf57446851","abstract_canon_sha256":"53be2d64cf46931224e0060b8084f4d415e7805756625ece8e70892192fc4fdc"},"schema_version":"1.0"},"canonical_sha256":"a6e80c92323e69f385f51af5244e3ce390d49855211a5626236b9a4ca307b395","source":{"kind":"arxiv","id":"1309.5571","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.5571","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"arxiv_version","alias_value":"1309.5571v1","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.5571","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"pith_short_12","alias_value":"U3UAZERSHZU7","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"U3UAZERSHZU7HBPV","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"U3UAZERS","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:U3UAZERSHZU7HBPVDL2SITR44O","target":"record","payload":{"canonical_record":{"source":{"id":"1309.5571","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-09-22T06:37:23Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"1c75e3dce9a9fe69df868f2b559ca35027a73170397d28607a8c39cf57446851","abstract_canon_sha256":"53be2d64cf46931224e0060b8084f4d415e7805756625ece8e70892192fc4fdc"},"schema_version":"1.0"},"canonical_sha256":"a6e80c92323e69f385f51af5244e3ce390d49855211a5626236b9a4ca307b395","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:34.568287Z","signature_b64":"zYlvZ8oXHZVdr8NvrmBWzrzRF/MCC7NbW3jKppKtA21sAMUUgC7E/91k/70K4NGcQMYgS1Qc/lFgO0Dif03LCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6e80c92323e69f385f51af5244e3ce390d49855211a5626236b9a4ca307b395","last_reissued_at":"2026-05-18T01:47:34.567734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:34.567734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.5571","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":"2026-05-18T01:47:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HDhUxrqpo9qV0TednLCSaoZtt94e3aFFe7st7xWPr94lco782GpAmQm8lRs0KWDkrPpehGyAbrS+CLJaHhVwAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:55:18.230748Z"},"content_sha256":"ea4c01676c051b469af1e25ec59ca2bb97c367ce3301b8f794e7130bb77a9450","schema_version":"1.0","event_id":"sha256:ea4c01676c051b469af1e25ec59ca2bb97c367ce3301b8f794e7130bb77a9450"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:U3UAZERSHZU7HBPVDL2SITR44O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The density matrix renormalization group algorithm on kilo-processor architectures: implementation and trade-offs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"cond-mat.str-el","authors_text":"Csaba Nemes, Gergely Barcza, \\\"Ors Legeza, P\\'eter Szolgay, Zolt\\'an Nagy","submitted_at":"2013-09-22T06:37:23Z","abstract_excerpt":"In the numerical analysis of strongly correlated quantum lattice models one of the leading algorithms developed to balance the size of the effective Hilbert space and the accuracy of the simulation is the density matrix renormalization group (DMRG) algorithm, in which the run-time is dominated by the iterative diagonalization of the Hamilton operator. As the most time-dominant step of the diagonalization can be expressed as a list of dense matrix operations, the DMRG is an appealing candidate to fully utilize the computing power residing in novel kilo-processor architectures. In the paper a sm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.5571","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":"2026-05-18T01:47:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ET4wx6WVKWgOALU42aXRJEFNobOPI5q/h3UQ33ejWrsAGCJRA/cbbKCD4mNj/y6zk75P00a0ZqqFmWD7HPS+Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T21:55:18.231090Z"},"content_sha256":"f5437df5aa91449671fe9c728673f05c1415ff0d9576e12224242c4a480d0e5c","schema_version":"1.0","event_id":"sha256:f5437df5aa91449671fe9c728673f05c1415ff0d9576e12224242c4a480d0e5c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U3UAZERSHZU7HBPVDL2SITR44O/bundle.json","state_url":"https://pith.science/pith/U3UAZERSHZU7HBPVDL2SITR44O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U3UAZERSHZU7HBPVDL2SITR44O/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":"2026-06-03T21:55:18Z","links":{"resolver":"https://pith.science/pith/U3UAZERSHZU7HBPVDL2SITR44O","bundle":"https://pith.science/pith/U3UAZERSHZU7HBPVDL2SITR44O/bundle.json","state":"https://pith.science/pith/U3UAZERSHZU7HBPVDL2SITR44O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U3UAZERSHZU7HBPVDL2SITR44O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:U3UAZERSHZU7HBPVDL2SITR44O","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":"53be2d64cf46931224e0060b8084f4d415e7805756625ece8e70892192fc4fdc","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-09-22T06:37:23Z","title_canon_sha256":"1c75e3dce9a9fe69df868f2b559ca35027a73170397d28607a8c39cf57446851"},"schema_version":"1.0","source":{"id":"1309.5571","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.5571","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"arxiv_version","alias_value":"1309.5571v1","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.5571","created_at":"2026-05-18T01:47:34Z"},{"alias_kind":"pith_short_12","alias_value":"U3UAZERSHZU7","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"U3UAZERSHZU7HBPV","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"U3UAZERS","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:f5437df5aa91449671fe9c728673f05c1415ff0d9576e12224242c4a480d0e5c","target":"graph","created_at":"2026-05-18T01:47:34Z","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":"In the numerical analysis of strongly correlated quantum lattice models one of the leading algorithms developed to balance the size of the effective Hilbert space and the accuracy of the simulation is the density matrix renormalization group (DMRG) algorithm, in which the run-time is dominated by the iterative diagonalization of the Hamilton operator. As the most time-dominant step of the diagonalization can be expressed as a list of dense matrix operations, the DMRG is an appealing candidate to fully utilize the computing power residing in novel kilo-processor architectures. In the paper a sm","authors_text":"Csaba Nemes, Gergely Barcza, \\\"Ors Legeza, P\\'eter Szolgay, Zolt\\'an Nagy","cross_cats":["physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-09-22T06:37:23Z","title":"The density matrix renormalization group algorithm on kilo-processor architectures: implementation and trade-offs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.5571","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:ea4c01676c051b469af1e25ec59ca2bb97c367ce3301b8f794e7130bb77a9450","target":"record","created_at":"2026-05-18T01:47:34Z","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":"53be2d64cf46931224e0060b8084f4d415e7805756625ece8e70892192fc4fdc","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-09-22T06:37:23Z","title_canon_sha256":"1c75e3dce9a9fe69df868f2b559ca35027a73170397d28607a8c39cf57446851"},"schema_version":"1.0","source":{"id":"1309.5571","kind":"arxiv","version":1}},"canonical_sha256":"a6e80c92323e69f385f51af5244e3ce390d49855211a5626236b9a4ca307b395","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6e80c92323e69f385f51af5244e3ce390d49855211a5626236b9a4ca307b395","first_computed_at":"2026-05-18T01:47:34.567734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:34.567734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zYlvZ8oXHZVdr8NvrmBWzrzRF/MCC7NbW3jKppKtA21sAMUUgC7E/91k/70K4NGcQMYgS1Qc/lFgO0Dif03LCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:34.568287Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.5571","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea4c01676c051b469af1e25ec59ca2bb97c367ce3301b8f794e7130bb77a9450","sha256:f5437df5aa91449671fe9c728673f05c1415ff0d9576e12224242c4a480d0e5c"],"state_sha256":"8ce875a119e260ba6e98e294748d18325e0548dd53f699e03f1ba8ac858fb810"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TlWuTDyTrk2bg4U06oTvBrZG7U3JGqYkuZG2U/tENfR/yEL5pHyVBbaCSlB4IAajTaNvefDiOMxMJpNOI8L1DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T21:55:18.233036Z","bundle_sha256":"4b1863c8d6e07c81de428232a058140fe9566a8fb7a158f2509cafbc86fe66b7"}}