{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:45XZOJV4MP53BB3ATDFAX236JV","short_pith_number":"pith:45XZOJV4","canonical_record":{"source":{"id":"2605.22428","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2026-05-21T12:50:20Z","cross_cats_sorted":[],"title_canon_sha256":"c0d82b0a8319db4de17b171adb9a20db46fb1a90faf026ab324744f4d44bb2bd","abstract_canon_sha256":"d827657723c5e0fa3ad88b84de620d6eabe702a0e37de22f522d35696421f7dd"},"schema_version":"1.0"},"canonical_sha256":"e76f9726bc63fbb0876098ca0beb7e4d532a801b862d36eb7b0b7bb7cba0934a","source":{"kind":"arxiv","id":"2605.22428","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.22428","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"arxiv_version","alias_value":"2605.22428v1","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.22428","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_12","alias_value":"45XZOJV4MP53","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_16","alias_value":"45XZOJV4MP53BB3A","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_8","alias_value":"45XZOJV4","created_at":"2026-05-22T01:04:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:45XZOJV4MP53BB3ATDFAX236JV","target":"record","payload":{"canonical_record":{"source":{"id":"2605.22428","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2026-05-21T12:50:20Z","cross_cats_sorted":[],"title_canon_sha256":"c0d82b0a8319db4de17b171adb9a20db46fb1a90faf026ab324744f4d44bb2bd","abstract_canon_sha256":"d827657723c5e0fa3ad88b84de620d6eabe702a0e37de22f522d35696421f7dd"},"schema_version":"1.0"},"canonical_sha256":"e76f9726bc63fbb0876098ca0beb7e4d532a801b862d36eb7b0b7bb7cba0934a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-22T01:04:42.697471Z","signature_b64":"vBjsPvkFJmE8Tux+Yj2suBv/h8dmkTfUi6U5dCQOXFPAgN0NFSa0zZqtBbKKN9rvfYYlQRRaH2ONJKEjPc+YDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e76f9726bc63fbb0876098ca0beb7e4d532a801b862d36eb7b0b7bb7cba0934a","last_reissued_at":"2026-05-22T01:04:42.696908Z","signature_status":"signed_v1","first_computed_at":"2026-05-22T01:04:42.696908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2605.22428","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":"2026-05-22T01:04:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kr8Piz/3fB+J0cT+MBEYdypFMWxIgyMOin0z+q2NW7PZLZ0eUhLfjWozL5Cc7ET/YI3GW6LKGbKNGGtirfovCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:57:59.084638Z"},"content_sha256":"59ee7a1c0b78fbd7f87de4a16de4fd1e37b4d36f402aa691d4c0231e78ccbdc5","schema_version":"1.0","event_id":"sha256:59ee7a1c0b78fbd7f87de4a16de4fd1e37b4d36f402aa691d4c0231e78ccbdc5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:45XZOJV4MP53BB3ATDFAX236JV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Exploiting Multicast for Accelerating Collective Communication","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.DC","authors_text":"Chao Xu, Chihyung Wang, Guoxin Qian, Jingbin Zhou, Xu Zhang, Yufeng Yao, Yuyan Wu, Zihang Luo","submitted_at":"2026-05-21T12:50:20Z","abstract_excerpt":"Reducing collective communication latency is a critical goal for large model training and inference in both academia and industry. Many-to-many communications, such as AllGather and AlltoAll (dispatch), are core components of modern parallelization strategies. State-of-the-art implementations of these communications rely on unicast-based writes and transmit duplicate copies of the same data across physical links for multiple receivers. This redundant transmission congests network bottlenecks and degrades end-to-end latency. We present MultiWrite, a novel many-to-many transmission semantic that"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.22428","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/2605.22428/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":"2026-05-22T01:04:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bT9Q83IMwpbMA+FSglJDeGVC50XAbXfAqwZ3h1dABgkICk3U6GtV+Dur5/4a0HBq24seWk8mBM2mNbJFvK5FBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:57:59.085403Z"},"content_sha256":"990980dc2a87b94003d88c39b6a40aa434a099c4923609fbb52842b4614a7e78","schema_version":"1.0","event_id":"sha256:990980dc2a87b94003d88c39b6a40aa434a099c4923609fbb52842b4614a7e78"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/45XZOJV4MP53BB3ATDFAX236JV/bundle.json","state_url":"https://pith.science/pith/45XZOJV4MP53BB3ATDFAX236JV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/45XZOJV4MP53BB3ATDFAX236JV/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":"2026-05-22T22:57:59Z","links":{"resolver":"https://pith.science/pith/45XZOJV4MP53BB3ATDFAX236JV","bundle":"https://pith.science/pith/45XZOJV4MP53BB3ATDFAX236JV/bundle.json","state":"https://pith.science/pith/45XZOJV4MP53BB3ATDFAX236JV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/45XZOJV4MP53BB3ATDFAX236JV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:45XZOJV4MP53BB3ATDFAX236JV","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":"d827657723c5e0fa3ad88b84de620d6eabe702a0e37de22f522d35696421f7dd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2026-05-21T12:50:20Z","title_canon_sha256":"c0d82b0a8319db4de17b171adb9a20db46fb1a90faf026ab324744f4d44bb2bd"},"schema_version":"1.0","source":{"id":"2605.22428","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.22428","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"arxiv_version","alias_value":"2605.22428v1","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.22428","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_12","alias_value":"45XZOJV4MP53","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_16","alias_value":"45XZOJV4MP53BB3A","created_at":"2026-05-22T01:04:42Z"},{"alias_kind":"pith_short_8","alias_value":"45XZOJV4","created_at":"2026-05-22T01:04:42Z"}],"graph_snapshots":[{"event_id":"sha256:990980dc2a87b94003d88c39b6a40aa434a099c4923609fbb52842b4614a7e78","target":"graph","created_at":"2026-05-22T01:04:42Z","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/2605.22428/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reducing collective communication latency is a critical goal for large model training and inference in both academia and industry. Many-to-many communications, such as AllGather and AlltoAll (dispatch), are core components of modern parallelization strategies. State-of-the-art implementations of these communications rely on unicast-based writes and transmit duplicate copies of the same data across physical links for multiple receivers. This redundant transmission congests network bottlenecks and degrades end-to-end latency. We present MultiWrite, a novel many-to-many transmission semantic that","authors_text":"Chao Xu, Chihyung Wang, Guoxin Qian, Jingbin Zhou, Xu Zhang, Yufeng Yao, Yuyan Wu, Zihang Luo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2026-05-21T12:50:20Z","title":"Exploiting Multicast for Accelerating Collective Communication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.22428","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":"sha256:59ee7a1c0b78fbd7f87de4a16de4fd1e37b4d36f402aa691d4c0231e78ccbdc5","target":"record","created_at":"2026-05-22T01:04:42Z","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":"d827657723c5e0fa3ad88b84de620d6eabe702a0e37de22f522d35696421f7dd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.DC","submitted_at":"2026-05-21T12:50:20Z","title_canon_sha256":"c0d82b0a8319db4de17b171adb9a20db46fb1a90faf026ab324744f4d44bb2bd"},"schema_version":"1.0","source":{"id":"2605.22428","kind":"arxiv","version":1}},"canonical_sha256":"e76f9726bc63fbb0876098ca0beb7e4d532a801b862d36eb7b0b7bb7cba0934a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e76f9726bc63fbb0876098ca0beb7e4d532a801b862d36eb7b0b7bb7cba0934a","first_computed_at":"2026-05-22T01:04:42.696908Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-22T01:04:42.696908Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vBjsPvkFJmE8Tux+Yj2suBv/h8dmkTfUi6U5dCQOXFPAgN0NFSa0zZqtBbKKN9rvfYYlQRRaH2ONJKEjPc+YDg==","signature_status":"signed_v1","signed_at":"2026-05-22T01:04:42.697471Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.22428","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:59ee7a1c0b78fbd7f87de4a16de4fd1e37b4d36f402aa691d4c0231e78ccbdc5","sha256:990980dc2a87b94003d88c39b6a40aa434a099c4923609fbb52842b4614a7e78"],"state_sha256":"9b3b0fbf6f8a96f62eeccea1ff284e0ad35ae2dfd3c02c8b28ebed17a13b82ca"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EqSkjXyADKvUlS0Kak7z2MugpeIQ5ohAK2hmgI5kU0MrggYlJq/p+0QTo80rMca6EfGUqpKKDXfbXkM4QApXBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T22:57:59.089591Z","bundle_sha256":"68cec50b170d7709343e4108a53b666d00deebf4a429c7a90b90964c3b338428"}}