{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FA2M6ZRZYJGZ7AV7WNVWCE2A62","short_pith_number":"pith:FA2M6ZRZ","canonical_record":{"source":{"id":"1806.02417","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-06T20:43:01Z","cross_cats_sorted":[],"title_canon_sha256":"b0c6ba5bf5a8bcdac6c1bcccad970c48d63a086fba749be864b41bdcb2eadf54","abstract_canon_sha256":"cf253d44cd46449bdea40b98b010d7daede47447faca33b97c695645f776e86e"},"schema_version":"1.0"},"canonical_sha256":"2834cf6639c24d9f82bfb36b611340f6850e442fb2c97a45d45f5ec21b52fe51","source":{"kind":"arxiv","id":"1806.02417","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02417","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02417v3","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02417","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"pith_short_12","alias_value":"FA2M6ZRZYJGZ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FA2M6ZRZYJGZ7AV7","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FA2M6ZRZ","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FA2M6ZRZYJGZ7AV7WNVWCE2A62","target":"record","payload":{"canonical_record":{"source":{"id":"1806.02417","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-06T20:43:01Z","cross_cats_sorted":[],"title_canon_sha256":"b0c6ba5bf5a8bcdac6c1bcccad970c48d63a086fba749be864b41bdcb2eadf54","abstract_canon_sha256":"cf253d44cd46449bdea40b98b010d7daede47447faca33b97c695645f776e86e"},"schema_version":"1.0"},"canonical_sha256":"2834cf6639c24d9f82bfb36b611340f6850e442fb2c97a45d45f5ec21b52fe51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:22.934079Z","signature_b64":"DxBS8Kh501x4CxISpaUJcma1R9Y31xBX295ccjUJ3viZMant+NSfQqyFoGuoXefEFHZ14N+GhIS28WxZKStABQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2834cf6639c24d9f82bfb36b611340f6850e442fb2c97a45d45f5ec21b52fe51","last_reissued_at":"2026-05-18T00:04:22.933514Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:22.933514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.02417","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:04:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PPlHYCX5oMFPypwmgAM/UketWVW0v5PJEJpnXfocfv2zRrMHcU3wMDirS5Jdi5Xi/MLgmFQvkKjOMGugFmtNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T06:30:10.634650Z"},"content_sha256":"51e5a7ce4ffa78731ac9c39625bec23515122fc1835d7ad768f76331c4a7b302","schema_version":"1.0","event_id":"sha256:51e5a7ce4ffa78731ac9c39625bec23515122fc1835d7ad768f76331c4a7b302"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FA2M6ZRZYJGZ7AV7WNVWCE2A62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"unyt: Handle, manipulate, and convert data with units in Python","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Anna L. Rosen, John A. ZuHone, Kacper Kowalik, Matthew J. Turk, Nathan J. Goldbaum","submitted_at":"2018-06-06T20:43:01Z","abstract_excerpt":"Software that processes real-world data or that models a physical system must have some way of managing units. While simple approaches like the understood convention that all data are in a unit system (such as the MKS SI unit system) do work in practice, they are fraught with possible sources of error both by developers and users of the software. In this paper we present unyt, a Python library based on NumPy and SymPy for handling data that has units. It is designed both to aid quick interactive calculations and to be tightly integrated into a larger Python application or library. We compare u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02417","kind":"arxiv","version":3},"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":"2026-05-18T00:04:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8bqVizYJv9jIJZrFdi1o5y57rQgoDu/ksLGKvV5WOXUliO83yfhj1wFMwa3r34wUos4Nys3r4sxWJ0cDHHLADA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T06:30:10.635219Z"},"content_sha256":"c38fa3343a79f2f5868c2693b4a94f341f6676503af14ef768cce025360037e4","schema_version":"1.0","event_id":"sha256:c38fa3343a79f2f5868c2693b4a94f341f6676503af14ef768cce025360037e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/bundle.json","state_url":"https://pith.science/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/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":"2026-05-27T06:30:10Z","links":{"resolver":"https://pith.science/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62","bundle":"https://pith.science/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/bundle.json","state":"https://pith.science/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FA2M6ZRZYJGZ7AV7WNVWCE2A62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FA2M6ZRZYJGZ7AV7WNVWCE2A62","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":"cf253d44cd46449bdea40b98b010d7daede47447faca33b97c695645f776e86e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-06T20:43:01Z","title_canon_sha256":"b0c6ba5bf5a8bcdac6c1bcccad970c48d63a086fba749be864b41bdcb2eadf54"},"schema_version":"1.0","source":{"id":"1806.02417","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.02417","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"arxiv_version","alias_value":"1806.02417v3","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.02417","created_at":"2026-05-18T00:04:22Z"},{"alias_kind":"pith_short_12","alias_value":"FA2M6ZRZYJGZ","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FA2M6ZRZYJGZ7AV7","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FA2M6ZRZ","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:c38fa3343a79f2f5868c2693b4a94f341f6676503af14ef768cce025360037e4","target":"graph","created_at":"2026-05-18T00:04:22Z","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":"Software that processes real-world data or that models a physical system must have some way of managing units. While simple approaches like the understood convention that all data are in a unit system (such as the MKS SI unit system) do work in practice, they are fraught with possible sources of error both by developers and users of the software. In this paper we present unyt, a Python library based on NumPy and SymPy for handling data that has units. It is designed both to aid quick interactive calculations and to be tightly integrated into a larger Python application or library. We compare u","authors_text":"Anna L. Rosen, John A. ZuHone, Kacper Kowalik, Matthew J. Turk, Nathan J. Goldbaum","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-06T20:43:01Z","title":"unyt: Handle, manipulate, and convert data with units in Python"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.02417","kind":"arxiv","version":3},"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":"sha256:51e5a7ce4ffa78731ac9c39625bec23515122fc1835d7ad768f76331c4a7b302","target":"record","created_at":"2026-05-18T00:04:22Z","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":"cf253d44cd46449bdea40b98b010d7daede47447faca33b97c695645f776e86e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-06-06T20:43:01Z","title_canon_sha256":"b0c6ba5bf5a8bcdac6c1bcccad970c48d63a086fba749be864b41bdcb2eadf54"},"schema_version":"1.0","source":{"id":"1806.02417","kind":"arxiv","version":3}},"canonical_sha256":"2834cf6639c24d9f82bfb36b611340f6850e442fb2c97a45d45f5ec21b52fe51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2834cf6639c24d9f82bfb36b611340f6850e442fb2c97a45d45f5ec21b52fe51","first_computed_at":"2026-05-18T00:04:22.933514Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:22.933514Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DxBS8Kh501x4CxISpaUJcma1R9Y31xBX295ccjUJ3viZMant+NSfQqyFoGuoXefEFHZ14N+GhIS28WxZKStABQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:22.934079Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.02417","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:51e5a7ce4ffa78731ac9c39625bec23515122fc1835d7ad768f76331c4a7b302","sha256:c38fa3343a79f2f5868c2693b4a94f341f6676503af14ef768cce025360037e4"],"state_sha256":"2c41413c1c1b212cf04124218f1bf6490dc9a23128eaf6030e762dfff7dfd20d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1J8qJ4bGbjhm5eaRdhWkC6GdwZnlTFfCqPohOhfNwXx4BtXbgUwea1npQuGkIzqYXfYPBRLSpyS6Nv1qTdwQCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T06:30:10.638325Z","bundle_sha256":"148175a04ce5becaa55bfe551e1eac8f583267ffa6507ce6a721e0c48ac90784"}}