{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OUBC664CVECGQZI5POQBIHEK4A","short_pith_number":"pith:OUBC664C","canonical_record":{"source":{"id":"1504.01754","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.SP","submitted_at":"2015-04-07T21:05:48Z","cross_cats_sorted":[],"title_canon_sha256":"e0661297e20e6889c9c8ac0e6a19ee4dae1373f8dd8c7bf428bd302c0b79723e","abstract_canon_sha256":"fa164fe999def48b4985d8e53a446a70d05506acb92ec6bc5be5b957ad60e0e7"},"schema_version":"1.0"},"canonical_sha256":"75022f7b82a90468651d7ba0141c8ae00968dc7b80e6bde474ed601e7f7dd5db","source":{"kind":"arxiv","id":"1504.01754","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01754","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01754v2","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01754","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"pith_short_12","alias_value":"OUBC664CVECG","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OUBC664CVECGQZI5","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OUBC664C","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OUBC664CVECGQZI5POQBIHEK4A","target":"record","payload":{"canonical_record":{"source":{"id":"1504.01754","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.SP","submitted_at":"2015-04-07T21:05:48Z","cross_cats_sorted":[],"title_canon_sha256":"e0661297e20e6889c9c8ac0e6a19ee4dae1373f8dd8c7bf428bd302c0b79723e","abstract_canon_sha256":"fa164fe999def48b4985d8e53a446a70d05506acb92ec6bc5be5b957ad60e0e7"},"schema_version":"1.0"},"canonical_sha256":"75022f7b82a90468651d7ba0141c8ae00968dc7b80e6bde474ed601e7f7dd5db","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:18:03.352432Z","signature_b64":"+tbeqDFDHSUHv85vNvz6TPaSTCo0e9PPhn8j09omMK/PU/bQBd/UCU6bMuq1nCAzrbbFKejUPr4XC/72I/RfCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75022f7b82a90468651d7ba0141c8ae00968dc7b80e6bde474ed601e7f7dd5db","last_reissued_at":"2026-05-18T02:18:03.351798Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:18:03.351798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.01754","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:18:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E7oeWq7czmJmCMcPZNiNe3v+cO1QNjtdZumrkNqZWR4pi8BAs/1N5P5LGEaNQi4/pR9QsrZomVkoqbDmqxVFBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T16:04:37.945928Z"},"content_sha256":"b84907e72312e028de955eabfede02160000d50182e33e2e14a87f8be2f7dfe8","schema_version":"1.0","event_id":"sha256:b84907e72312e028de955eabfede02160000d50182e33e2e14a87f8be2f7dfe8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OUBC664CVECGQZI5POQBIHEK4A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mixed spectral regimes for square Fibonacci Hamiltonians","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"math.SP","authors_text":"Jake Fillman, William Yessen, Yuki Takahashi","submitted_at":"2015-04-07T21:05:48Z","abstract_excerpt":"For the square tridiagonal Fibonacci Hamiltonian, we prove existence of an open set of parameters which yield mixed interval-Cantor spectra (i.e. spectra containing an interval as well as a Cantor set), as well as mixed density of states measure (i.e. one whose absolutely continuous and singular continuous components are both nonzero). Using the methods developed in this paper, we also show existence of parameter regimes for the square continuum Fibonacci Schrodinger operator yielding mixed interval-Cantor spectra. These examples provide the first explicit examples of an interesting phenomenon"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01754","kind":"arxiv","version":2},"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":"2026-05-18T02:18:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VilVGvJK4WblpIgoR6Y5n0YNXhCAGbW/rvk89omLSU5mxKJvxYk57V8ZWDsYuWKcaVn7m+QA15khVHSMIhEXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T16:04:37.946367Z"},"content_sha256":"ab09b80dac9de2799011345d765cf5c95f81ecc297b81bad6cdd6576d80330f8","schema_version":"1.0","event_id":"sha256:ab09b80dac9de2799011345d765cf5c95f81ecc297b81bad6cdd6576d80330f8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OUBC664CVECGQZI5POQBIHEK4A/bundle.json","state_url":"https://pith.science/pith/OUBC664CVECGQZI5POQBIHEK4A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OUBC664CVECGQZI5POQBIHEK4A/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":"2026-05-31T16:04:37Z","links":{"resolver":"https://pith.science/pith/OUBC664CVECGQZI5POQBIHEK4A","bundle":"https://pith.science/pith/OUBC664CVECGQZI5POQBIHEK4A/bundle.json","state":"https://pith.science/pith/OUBC664CVECGQZI5POQBIHEK4A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OUBC664CVECGQZI5POQBIHEK4A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OUBC664CVECGQZI5POQBIHEK4A","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":"fa164fe999def48b4985d8e53a446a70d05506acb92ec6bc5be5b957ad60e0e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.SP","submitted_at":"2015-04-07T21:05:48Z","title_canon_sha256":"e0661297e20e6889c9c8ac0e6a19ee4dae1373f8dd8c7bf428bd302c0b79723e"},"schema_version":"1.0","source":{"id":"1504.01754","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01754","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01754v2","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01754","created_at":"2026-05-18T02:18:03Z"},{"alias_kind":"pith_short_12","alias_value":"OUBC664CVECG","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OUBC664CVECGQZI5","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OUBC664C","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:ab09b80dac9de2799011345d765cf5c95f81ecc297b81bad6cdd6576d80330f8","target":"graph","created_at":"2026-05-18T02:18:03Z","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":"For the square tridiagonal Fibonacci Hamiltonian, we prove existence of an open set of parameters which yield mixed interval-Cantor spectra (i.e. spectra containing an interval as well as a Cantor set), as well as mixed density of states measure (i.e. one whose absolutely continuous and singular continuous components are both nonzero). Using the methods developed in this paper, we also show existence of parameter regimes for the square continuum Fibonacci Schrodinger operator yielding mixed interval-Cantor spectra. These examples provide the first explicit examples of an interesting phenomenon","authors_text":"Jake Fillman, William Yessen, Yuki Takahashi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.SP","submitted_at":"2015-04-07T21:05:48Z","title":"Mixed spectral regimes for square Fibonacci Hamiltonians"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01754","kind":"arxiv","version":2},"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:b84907e72312e028de955eabfede02160000d50182e33e2e14a87f8be2f7dfe8","target":"record","created_at":"2026-05-18T02:18:03Z","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":"fa164fe999def48b4985d8e53a446a70d05506acb92ec6bc5be5b957ad60e0e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.SP","submitted_at":"2015-04-07T21:05:48Z","title_canon_sha256":"e0661297e20e6889c9c8ac0e6a19ee4dae1373f8dd8c7bf428bd302c0b79723e"},"schema_version":"1.0","source":{"id":"1504.01754","kind":"arxiv","version":2}},"canonical_sha256":"75022f7b82a90468651d7ba0141c8ae00968dc7b80e6bde474ed601e7f7dd5db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75022f7b82a90468651d7ba0141c8ae00968dc7b80e6bde474ed601e7f7dd5db","first_computed_at":"2026-05-18T02:18:03.351798Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:18:03.351798Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+tbeqDFDHSUHv85vNvz6TPaSTCo0e9PPhn8j09omMK/PU/bQBd/UCU6bMuq1nCAzrbbFKejUPr4XC/72I/RfCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:18:03.352432Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.01754","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b84907e72312e028de955eabfede02160000d50182e33e2e14a87f8be2f7dfe8","sha256:ab09b80dac9de2799011345d765cf5c95f81ecc297b81bad6cdd6576d80330f8"],"state_sha256":"a126eb9bb556d01d303c7e8b464884cd3f0d3d33fe981727bf2a9bc9190c919b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"URGZvDwRRYUjOvB0CCLDMqlLMcz62Ws+b5otiEgJiDYTqbO9R7FcV9HtvkCI2pYUtcbvFHAYb+wpywcaWlkwCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T16:04:37.950426Z","bundle_sha256":"abd0bdcc54463a1a2c9167c8e5f505b4598c4fbf7e192071eedc948597146aee"}}