{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:QWC7E2KVYUIXYQETF5OJZO536R","short_pith_number":"pith:QWC7E2KV","canonical_record":{"source":{"id":"2607.21446","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-07-23T15:52:20Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"fd9d548ae43663916c2ba9b0266b73ad062bc6b4d5d73b695f190cb2472b8a15","abstract_canon_sha256":"1395fce8f705b0d8aa67244ac42dc3b527f9cb2ebb6fb5f40405b249e4af823b"},"schema_version":"1.0"},"canonical_sha256":"8585f26955c5117c40932f5c9cbbbbf464c4e9ad729686026addad98f5585de0","source":{"kind":"arxiv","id":"2607.21446","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21446","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21446v1","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21446","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_12","alias_value":"QWC7E2KVYUIX","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_16","alias_value":"QWC7E2KVYUIXYQET","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_8","alias_value":"QWC7E2KV","created_at":"2026-07-24T01:24:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:QWC7E2KVYUIXYQETF5OJZO536R","target":"record","payload":{"canonical_record":{"source":{"id":"2607.21446","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-07-23T15:52:20Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"fd9d548ae43663916c2ba9b0266b73ad062bc6b4d5d73b695f190cb2472b8a15","abstract_canon_sha256":"1395fce8f705b0d8aa67244ac42dc3b527f9cb2ebb6fb5f40405b249e4af823b"},"schema_version":"1.0"},"canonical_sha256":"8585f26955c5117c40932f5c9cbbbbf464c4e9ad729686026addad98f5585de0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-24T01:24:33.127632Z","signature_b64":"UqZ5rfzGeKcnShJ/gmTlTtEkBT+V86gwPnu3x6woLhhharPtzJ6l1yEdTJoTlCnrL5lr11yUdDfj9c00GdX5Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8585f26955c5117c40932f5c9cbbbbf464c4e9ad729686026addad98f5585de0","last_reissued_at":"2026-07-24T01:24:33.126741Z","signature_status":"signed_v1","first_computed_at":"2026-07-24T01:24:33.126741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.21446","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":"2026-07-24T01:24:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TCP+IiuFJIJRvOaUyLIznIf+hwxjLyd3rS00UR0odvgrK0RBRkSxmVG76o/BFQLa0DeRKXySsgg+r5O+2fiUCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T12:37:04.682841Z"},"content_sha256":"4d662cad125d291ebe878d83e68914ab60aab88da365ab8d0fd8979a9ba1a8ee","schema_version":"1.0","event_id":"sha256:4d662cad125d291ebe878d83e68914ab60aab88da365ab8d0fd8979a9ba1a8ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:QWC7E2KVYUIXYQETF5OJZO536R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"KroQuant: Kronecker-Structured Block Transforms for Efficient Post-Training Quantization of Diffusion Transformers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"cs.LG","authors_text":"Alireza Khodamoradi, Kristof Denolf, Mathieu Salzmann, Yann Bouquet","submitted_at":"2026-07-23T15:52:20Z","abstract_excerpt":"Post-training quantization (PTQ) of diffusion transformers (DiTs) to W4A4 severely degrades output quality, because activations entering each linear layer contain outliers that 4-bit formats cannot represent. The standard fix applies an invertible linear transform to the activations and its inverse to the weights before quantizing both. Normalization layers between blocks force this transform to run online at every denoising step, making its inference computation cost the binding design constraint. Existing options trade quantization quality for inference cost: per-channel scaling (SmoothQuant"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21446","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.21446/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-24T01:24:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lffLE5S5wAoQio+PEbZpqUbDVr6YXd1XfoS9fHejUj6padYRQF3Y7ZJNam6FIr/MkjAYiVEV42BXvO+uv+J3DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T12:37:04.683332Z"},"content_sha256":"ae6d827b08b7b68802d3c3ccf2a7bef6e43a8d905598b0d72fcdf15002f21ba9","schema_version":"1.0","event_id":"sha256:ae6d827b08b7b68802d3c3ccf2a7bef6e43a8d905598b0d72fcdf15002f21ba9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QWC7E2KVYUIXYQETF5OJZO536R/bundle.json","state_url":"https://pith.science/pith/QWC7E2KVYUIXYQETF5OJZO536R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QWC7E2KVYUIXYQETF5OJZO536R/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":"2026-08-05T12:37:04Z","links":{"resolver":"https://pith.science/pith/QWC7E2KVYUIXYQETF5OJZO536R","bundle":"https://pith.science/pith/QWC7E2KVYUIXYQETF5OJZO536R/bundle.json","state":"https://pith.science/pith/QWC7E2KVYUIXYQETF5OJZO536R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QWC7E2KVYUIXYQETF5OJZO536R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:QWC7E2KVYUIXYQETF5OJZO536R","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":"1395fce8f705b0d8aa67244ac42dc3b527f9cb2ebb6fb5f40405b249e4af823b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-07-23T15:52:20Z","title_canon_sha256":"fd9d548ae43663916c2ba9b0266b73ad062bc6b4d5d73b695f190cb2472b8a15"},"schema_version":"1.0","source":{"id":"2607.21446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.21446","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"arxiv_version","alias_value":"2607.21446v1","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.21446","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_12","alias_value":"QWC7E2KVYUIX","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_16","alias_value":"QWC7E2KVYUIXYQET","created_at":"2026-07-24T01:24:33Z"},{"alias_kind":"pith_short_8","alias_value":"QWC7E2KV","created_at":"2026-07-24T01:24:33Z"}],"graph_snapshots":[{"event_id":"sha256:ae6d827b08b7b68802d3c3ccf2a7bef6e43a8d905598b0d72fcdf15002f21ba9","target":"graph","created_at":"2026-07-24T01:24:33Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.21446/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Post-training quantization (PTQ) of diffusion transformers (DiTs) to W4A4 severely degrades output quality, because activations entering each linear layer contain outliers that 4-bit formats cannot represent. The standard fix applies an invertible linear transform to the activations and its inverse to the weights before quantizing both. Normalization layers between blocks force this transform to run online at every denoising step, making its inference computation cost the binding design constraint. Existing options trade quantization quality for inference cost: per-channel scaling (SmoothQuant","authors_text":"Alireza Khodamoradi, Kristof Denolf, Mathieu Salzmann, Yann Bouquet","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-07-23T15:52:20Z","title":"KroQuant: Kronecker-Structured Block Transforms for Efficient Post-Training Quantization of Diffusion Transformers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.21446","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":"sha256:4d662cad125d291ebe878d83e68914ab60aab88da365ab8d0fd8979a9ba1a8ee","target":"record","created_at":"2026-07-24T01:24:33Z","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":"1395fce8f705b0d8aa67244ac42dc3b527f9cb2ebb6fb5f40405b249e4af823b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2026-07-23T15:52:20Z","title_canon_sha256":"fd9d548ae43663916c2ba9b0266b73ad062bc6b4d5d73b695f190cb2472b8a15"},"schema_version":"1.0","source":{"id":"2607.21446","kind":"arxiv","version":1}},"canonical_sha256":"8585f26955c5117c40932f5c9cbbbbf464c4e9ad729686026addad98f5585de0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8585f26955c5117c40932f5c9cbbbbf464c4e9ad729686026addad98f5585de0","first_computed_at":"2026-07-24T01:24:33.126741Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-24T01:24:33.126741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UqZ5rfzGeKcnShJ/gmTlTtEkBT+V86gwPnu3x6woLhhharPtzJ6l1yEdTJoTlCnrL5lr11yUdDfj9c00GdX5Ag==","signature_status":"signed_v1","signed_at":"2026-07-24T01:24:33.127632Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.21446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d662cad125d291ebe878d83e68914ab60aab88da365ab8d0fd8979a9ba1a8ee","sha256:ae6d827b08b7b68802d3c3ccf2a7bef6e43a8d905598b0d72fcdf15002f21ba9"],"state_sha256":"4b646f433f29ce03924559e62cc58e9fcdcc57e44cc3da790f185ef89e6179e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Awa+aGjUQNCm3zLyurrLCIEFToHwI8uYSVbOjkrZShLTJNdvpEXk11asw0G93dZxyHCV4t3qvMBNFRJqe+fWCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T12:37:04.686746Z","bundle_sha256":"cfc1a7c4298e3305eb34943c7549db5e96d37bebbdd08320a24b6524d842bce0"}}