{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:6BX2C4W2ZCRGCK5OBNFVTVEAEK","short_pith_number":"pith:6BX2C4W2","canonical_record":{"source":{"id":"2508.19907","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2025-08-27T14:10:16Z","cross_cats_sorted":["cs.SI"],"title_canon_sha256":"f7d48a94aee18dadf1a1c7fde08bb025737356cb2396d03be4b66b043290b89a","abstract_canon_sha256":"72cae71fb0fdf8eac7d726dcd6f0e0625c11c64c14b33005676440fb9becc0ee"},"schema_version":"1.0"},"canonical_sha256":"f06fa172dac8a2612bae0b4b59d480228581fff1678eeb3bffed44cdeb570855","source":{"kind":"arxiv","id":"2508.19907","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.19907","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"arxiv_version","alias_value":"2508.19907v1","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.19907","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_12","alias_value":"6BX2C4W2ZCRG","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_16","alias_value":"6BX2C4W2ZCRGCK5O","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_8","alias_value":"6BX2C4W2","created_at":"2026-07-05T12:00:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:6BX2C4W2ZCRGCK5OBNFVTVEAEK","target":"record","payload":{"canonical_record":{"source":{"id":"2508.19907","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2025-08-27T14:10:16Z","cross_cats_sorted":["cs.SI"],"title_canon_sha256":"f7d48a94aee18dadf1a1c7fde08bb025737356cb2396d03be4b66b043290b89a","abstract_canon_sha256":"72cae71fb0fdf8eac7d726dcd6f0e0625c11c64c14b33005676440fb9becc0ee"},"schema_version":"1.0"},"canonical_sha256":"f06fa172dac8a2612bae0b4b59d480228581fff1678eeb3bffed44cdeb570855","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:00:19.740502Z","signature_b64":"uY1/8+ma05Sk5WZcj2GOei1gyXfMlTrYTTpDVd3Fm2GckUXkYKo5jBvLFLVJHqVJTXiC+8ip24tMWnc/6Vs2BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f06fa172dac8a2612bae0b4b59d480228581fff1678eeb3bffed44cdeb570855","last_reissued_at":"2026-07-05T12:00:19.740034Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:00:19.740034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2508.19907","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":"2026-07-05T12:00:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bK5pY5Xvx0JrDAqo9AgZ0WCHoG/F2kEBiU7EdVKrL3rkhRXL1oTmLO51rgcPBl/bArYIrXBdZubIaOSv97WbBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T21:44:21.241387Z"},"content_sha256":"3dae8222d803a229f48ef70497910bc0449ecdada509090d54d726caa33aa632","schema_version":"1.0","event_id":"sha256:3dae8222d803a229f48ef70497910bc0449ecdada509090d54d726caa33aa632"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:6BX2C4W2ZCRGCK5OBNFVTVEAEK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GegenNet: Spectral Convolutional Neural Networks for Link Sign Prediction in Signed Bipartite Graphs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SI"],"primary_cat":"cs.LG","authors_text":"Hewen Wang, Renchi Yang, Xiaokui Xiao","submitted_at":"2025-08-27T14:10:16Z","abstract_excerpt":"Given a signed bipartite graph (SBG) G with two disjoint node sets U and V, the goal of link sign prediction is to predict the signs of potential links connecting U and V based on known positive and negative edges in G. The majority of existing solutions towards link sign prediction mainly focus on unipartite signed graphs, which are sub-optimal due to the neglect of node heterogeneity and unique bipartite characteristics of SBGs. To this end, recent studies adapt graph neural networks to SBGs by introducing message-passing schemes for both inter-partition (UxV) and intra-partition (UxU or VxV"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.19907","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/2508.19907/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":"2026-07-05T12:00:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pFcRtNcLC2XS3ksaotM9w2m4LobvhfznpbmBtj8S5LjcbJATPeEw2p5iR3egkJK0keufQATbPFROT5eZnyALCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T21:44:21.241942Z"},"content_sha256":"1e046afdb291532fcfd5e30457ab84676a36480b7b39dca3088dd8b98902cb5a","schema_version":"1.0","event_id":"sha256:1e046afdb291532fcfd5e30457ab84676a36480b7b39dca3088dd8b98902cb5a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/bundle.json","state_url":"https://pith.science/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/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":"2026-08-05T21:44:21Z","links":{"resolver":"https://pith.science/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK","bundle":"https://pith.science/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/bundle.json","state":"https://pith.science/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6BX2C4W2ZCRGCK5OBNFVTVEAEK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:6BX2C4W2ZCRGCK5OBNFVTVEAEK","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":"72cae71fb0fdf8eac7d726dcd6f0e0625c11c64c14b33005676440fb9becc0ee","cross_cats_sorted":["cs.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2025-08-27T14:10:16Z","title_canon_sha256":"f7d48a94aee18dadf1a1c7fde08bb025737356cb2396d03be4b66b043290b89a"},"schema_version":"1.0","source":{"id":"2508.19907","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2508.19907","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"arxiv_version","alias_value":"2508.19907v1","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.19907","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_12","alias_value":"6BX2C4W2ZCRG","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_16","alias_value":"6BX2C4W2ZCRGCK5O","created_at":"2026-07-05T12:00:19Z"},{"alias_kind":"pith_short_8","alias_value":"6BX2C4W2","created_at":"2026-07-05T12:00:19Z"}],"graph_snapshots":[{"event_id":"sha256:1e046afdb291532fcfd5e30457ab84676a36480b7b39dca3088dd8b98902cb5a","target":"graph","created_at":"2026-07-05T12:00:19Z","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/2508.19907/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Given a signed bipartite graph (SBG) G with two disjoint node sets U and V, the goal of link sign prediction is to predict the signs of potential links connecting U and V based on known positive and negative edges in G. The majority of existing solutions towards link sign prediction mainly focus on unipartite signed graphs, which are sub-optimal due to the neglect of node heterogeneity and unique bipartite characteristics of SBGs. To this end, recent studies adapt graph neural networks to SBGs by introducing message-passing schemes for both inter-partition (UxV) and intra-partition (UxU or VxV","authors_text":"Hewen Wang, Renchi Yang, Xiaokui Xiao","cross_cats":["cs.SI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2025-08-27T14:10:16Z","title":"GegenNet: Spectral Convolutional Neural Networks for Link Sign Prediction in Signed Bipartite Graphs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.19907","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":"sha256:3dae8222d803a229f48ef70497910bc0449ecdada509090d54d726caa33aa632","target":"record","created_at":"2026-07-05T12:00:19Z","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":"72cae71fb0fdf8eac7d726dcd6f0e0625c11c64c14b33005676440fb9becc0ee","cross_cats_sorted":["cs.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2025-08-27T14:10:16Z","title_canon_sha256":"f7d48a94aee18dadf1a1c7fde08bb025737356cb2396d03be4b66b043290b89a"},"schema_version":"1.0","source":{"id":"2508.19907","kind":"arxiv","version":1}},"canonical_sha256":"f06fa172dac8a2612bae0b4b59d480228581fff1678eeb3bffed44cdeb570855","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f06fa172dac8a2612bae0b4b59d480228581fff1678eeb3bffed44cdeb570855","first_computed_at":"2026-07-05T12:00:19.740034Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T12:00:19.740034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uY1/8+ma05Sk5WZcj2GOei1gyXfMlTrYTTpDVd3Fm2GckUXkYKo5jBvLFLVJHqVJTXiC+8ip24tMWnc/6Vs2BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T12:00:19.740502Z","signed_message":"canonical_sha256_bytes"},"source_id":"2508.19907","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3dae8222d803a229f48ef70497910bc0449ecdada509090d54d726caa33aa632","sha256:1e046afdb291532fcfd5e30457ab84676a36480b7b39dca3088dd8b98902cb5a"],"state_sha256":"5f12836b03fce89079bf03aebee92f1c42314046596d5cd09492a6612f5600ab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uK3tKJ9QX+PRGn+hsk7HuvyB/OMcsXis9ZfQgJ4alkNQhNjdlm3LLG2UttIrzG94ZXX4xPOG6c5DqkvDvSiGAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T21:44:21.247299Z","bundle_sha256":"7c9af11342bde504849960b2361a677bbf1bdef3bd6e9703e94336b16d1b6fa7"}}