{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SU7QXU4XLEM44NCG3KURG2HZTN","short_pith_number":"pith:SU7QXU4X","canonical_record":{"source":{"id":"1708.06120","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-08-21T08:41:00Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"acdaccd75e37980d994e12cd8a7852489c0261af92471c564b55342f67af531a","abstract_canon_sha256":"d38510173ac093753966a1cb08fd88c114078a3afa0d1d267a3b05ab123950c5"},"schema_version":"1.0"},"canonical_sha256":"953f0bd3975919ce3446daa91368f99b4cf3be1e8963e7711bc62ce5fd96f5a4","source":{"kind":"arxiv","id":"1708.06120","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.06120","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"arxiv_version","alias_value":"1708.06120v1","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.06120","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"pith_short_12","alias_value":"SU7QXU4XLEM4","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SU7QXU4XLEM44NCG","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SU7QXU4X","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SU7QXU4XLEM44NCG3KURG2HZTN","target":"record","payload":{"canonical_record":{"source":{"id":"1708.06120","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-08-21T08:41:00Z","cross_cats_sorted":["physics.plasm-ph"],"title_canon_sha256":"acdaccd75e37980d994e12cd8a7852489c0261af92471c564b55342f67af531a","abstract_canon_sha256":"d38510173ac093753966a1cb08fd88c114078a3afa0d1d267a3b05ab123950c5"},"schema_version":"1.0"},"canonical_sha256":"953f0bd3975919ce3446daa91368f99b4cf3be1e8963e7711bc62ce5fd96f5a4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:43.162116Z","signature_b64":"Y4JiDZK3iB5qoNNETKjqxAsEDdla0UmBrYWDYNuekekyIbqeK/B7xCTAs7/DMlGIvDg/fJucO4k0k0dN8wFxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"953f0bd3975919ce3446daa91368f99b4cf3be1e8963e7711bc62ce5fd96f5a4","last_reissued_at":"2026-05-18T00:37:43.161485Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:43.161485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.06120","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":"2026-05-18T00:37:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jT4EHCPbg6GWiDeLHcl1pXnroxMpqaOr0wf34FBk2MI0QzU9nyueQDbPS4MddbQxLUTjcDizr4TqONduH4//Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:34:24.818676Z"},"content_sha256":"3cec48a52a82c20b641de9e5df8e25a6e55071681e7392b9055baaa0a2e70168","schema_version":"1.0","event_id":"sha256:3cec48a52a82c20b641de9e5df8e25a6e55071681e7392b9055baaa0a2e70168"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SU7QXU4XLEM44NCG3KURG2HZTN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Amplification of large-scale magnetic field in nonhelical magnetohydrodynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.plasm-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Mahendra K. Verma, Rohit Kumar","submitted_at":"2017-08-21T08:41:00Z","abstract_excerpt":"It is typically assumed that the kinetic and magnetic helicities play a crucial role in the growth of large-scale dynamo. In this paper we demonstrate that helicity is not essential for the amplification of large-scale magnetic field. For this purpose, we perform nonhelical magnetohydrodynamic (MHD) simulation, and show that the large-scale magnetic field can grow in nonhelical MHD when random external forcing is employed at scale $1/10$ the box size. The energy fluxes and shell-to-shell transfer rates computed using the numerical data show that the large-scale magnetic energy grows due to the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.06120","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":"2026-05-18T00:37:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"30F2xz61L6fHT0r5/DzTkwYwqvMM+OeW2PH24NEHPcUNrZi20qvSeXt3FodDFT3ro/5Gm3VcArG3iFy3I6PLCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T03:34:24.819038Z"},"content_sha256":"0c240af514f2598385eca63a994aad3b87b8905c4479e38e5638acfc7bfbf013","schema_version":"1.0","event_id":"sha256:0c240af514f2598385eca63a994aad3b87b8905c4479e38e5638acfc7bfbf013"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SU7QXU4XLEM44NCG3KURG2HZTN/bundle.json","state_url":"https://pith.science/pith/SU7QXU4XLEM44NCG3KURG2HZTN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SU7QXU4XLEM44NCG3KURG2HZTN/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":"2026-06-04T03:34:24Z","links":{"resolver":"https://pith.science/pith/SU7QXU4XLEM44NCG3KURG2HZTN","bundle":"https://pith.science/pith/SU7QXU4XLEM44NCG3KURG2HZTN/bundle.json","state":"https://pith.science/pith/SU7QXU4XLEM44NCG3KURG2HZTN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SU7QXU4XLEM44NCG3KURG2HZTN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SU7QXU4XLEM44NCG3KURG2HZTN","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":"d38510173ac093753966a1cb08fd88c114078a3afa0d1d267a3b05ab123950c5","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-08-21T08:41:00Z","title_canon_sha256":"acdaccd75e37980d994e12cd8a7852489c0261af92471c564b55342f67af531a"},"schema_version":"1.0","source":{"id":"1708.06120","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.06120","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"arxiv_version","alias_value":"1708.06120v1","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.06120","created_at":"2026-05-18T00:37:43Z"},{"alias_kind":"pith_short_12","alias_value":"SU7QXU4XLEM4","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SU7QXU4XLEM44NCG","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SU7QXU4X","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:0c240af514f2598385eca63a994aad3b87b8905c4479e38e5638acfc7bfbf013","target":"graph","created_at":"2026-05-18T00:37:43Z","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":"It is typically assumed that the kinetic and magnetic helicities play a crucial role in the growth of large-scale dynamo. In this paper we demonstrate that helicity is not essential for the amplification of large-scale magnetic field. For this purpose, we perform nonhelical magnetohydrodynamic (MHD) simulation, and show that the large-scale magnetic field can grow in nonhelical MHD when random external forcing is employed at scale $1/10$ the box size. The energy fluxes and shell-to-shell transfer rates computed using the numerical data show that the large-scale magnetic energy grows due to the","authors_text":"Mahendra K. Verma, Rohit Kumar","cross_cats":["physics.plasm-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-08-21T08:41:00Z","title":"Amplification of large-scale magnetic field in nonhelical magnetohydrodynamics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.06120","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":"sha256:3cec48a52a82c20b641de9e5df8e25a6e55071681e7392b9055baaa0a2e70168","target":"record","created_at":"2026-05-18T00:37:43Z","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":"d38510173ac093753966a1cb08fd88c114078a3afa0d1d267a3b05ab123950c5","cross_cats_sorted":["physics.plasm-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2017-08-21T08:41:00Z","title_canon_sha256":"acdaccd75e37980d994e12cd8a7852489c0261af92471c564b55342f67af531a"},"schema_version":"1.0","source":{"id":"1708.06120","kind":"arxiv","version":1}},"canonical_sha256":"953f0bd3975919ce3446daa91368f99b4cf3be1e8963e7711bc62ce5fd96f5a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"953f0bd3975919ce3446daa91368f99b4cf3be1e8963e7711bc62ce5fd96f5a4","first_computed_at":"2026-05-18T00:37:43.161485Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:43.161485Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y4JiDZK3iB5qoNNETKjqxAsEDdla0UmBrYWDYNuekekyIbqeK/B7xCTAs7/DMlGIvDg/fJucO4k0k0dN8wFxBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:43.162116Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.06120","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cec48a52a82c20b641de9e5df8e25a6e55071681e7392b9055baaa0a2e70168","sha256:0c240af514f2598385eca63a994aad3b87b8905c4479e38e5638acfc7bfbf013"],"state_sha256":"c2933c824d629cc89eb4e5a32ab4a8c13616f473d34282979fdc080c481e4987"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AhPXV5t79CYX1Mgt/c7CKCUXGFu9kQhnF1Glsgr8vAILP4dJZwneQIb+Ko+scrAsExwnUf3LJwzl/J9ZEh0MAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T03:34:24.821485Z","bundle_sha256":"096818e7b217301e2e08d6e931a1a4ce6cb40254500d1ee3dd3ac931f52a2f59"}}