{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:XVEP5AS6XSRN27CESATSYW6F2O","short_pith_number":"pith:XVEP5AS6","canonical_record":{"source":{"id":"2010.09515","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-19T13:49:29Z","cross_cats_sorted":["cs.AI","stat.ML"],"title_canon_sha256":"7e5f47b9471892bd2772e273026894e877b76b59368cd6a3cf61fdab5d0d4d92","abstract_canon_sha256":"99b6882a997ff857110410fa2838c73bf13c0d3ab91ae848277706d8008394d1"},"schema_version":"1.0"},"canonical_sha256":"bd48fe825ebca2dd7c4490272c5bc5d38b17e3ff8eea7db7949315bc51f46499","source":{"kind":"arxiv","id":"2010.09515","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.09515","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"arxiv_version","alias_value":"2010.09515v2","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.09515","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_12","alias_value":"XVEP5AS6XSRN","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_16","alias_value":"XVEP5AS6XSRN27CE","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_8","alias_value":"XVEP5AS6","created_at":"2026-07-05T02:25:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:XVEP5AS6XSRN27CESATSYW6F2O","target":"record","payload":{"canonical_record":{"source":{"id":"2010.09515","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-19T13:49:29Z","cross_cats_sorted":["cs.AI","stat.ML"],"title_canon_sha256":"7e5f47b9471892bd2772e273026894e877b76b59368cd6a3cf61fdab5d0d4d92","abstract_canon_sha256":"99b6882a997ff857110410fa2838c73bf13c0d3ab91ae848277706d8008394d1"},"schema_version":"1.0"},"canonical_sha256":"bd48fe825ebca2dd7c4490272c5bc5d38b17e3ff8eea7db7949315bc51f46499","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:25:11.122145Z","signature_b64":"zQlqJquGzVTiP/N1YvR1qESEskM82boaJ5lkRZmjUHoQDS4VDw83HqGUdB27M+yrZN+dJykmpkJncgBjOnNIAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd48fe825ebca2dd7c4490272c5bc5d38b17e3ff8eea7db7949315bc51f46499","last_reissued_at":"2026-07-05T02:25:11.121720Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:25:11.121720Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.09515","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:25:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KTIeourIxYaYGzQe93rPNhRtQYHrQbPVjhbpC3TsZQL6poYvFykpm+jGJgR/zoElrrSYtQyXVKUYQYRN0FolCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:24:13.473468Z"},"content_sha256":"a2036e601867416cdce01eacf39cbb1dd37694ef4a21584c968d97570cf6c1fe","schema_version":"1.0","event_id":"sha256:a2036e601867416cdce01eacf39cbb1dd37694ef4a21584c968d97570cf6c1fe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:XVEP5AS6XSRN27CESATSYW6F2O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving Transformation Invariance in Contrastive Representation Learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","stat.ML"],"primary_cat":"cs.LG","authors_text":"Adam Foster, Rattana Pukdee, Tom Rainforth","submitted_at":"2020-10-19T13:49:29Z","abstract_excerpt":"We propose methods to strengthen the invariance properties of representations obtained by contrastive learning. While existing approaches implicitly induce a degree of invariance as representations are learned, we look to more directly enforce invariance in the encoding process. To this end, we first introduce a training objective for contrastive learning that uses a novel regularizer to control how the representation changes under transformation. We show that representations trained with this objective perform better on downstream tasks and are more robust to the introduction of nuisance tran"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.09515","kind":"arxiv","version":2},"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/2010.09515/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":"2026-07-05T02:25:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qz5X/TdQKwcG5ZM42vLIM+ZYr8Di1Z2WqePG5XDyQnPuH0TeIoiup30QNhY4x0GUP4NEUqzK+TOzG0o6nIjwCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:24:13.473958Z"},"content_sha256":"da1fed680691a761d0ae02a44ac51674645eeef4c03e4ae9fea147f88a6c9881","schema_version":"1.0","event_id":"sha256:da1fed680691a761d0ae02a44ac51674645eeef4c03e4ae9fea147f88a6c9881"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XVEP5AS6XSRN27CESATSYW6F2O/bundle.json","state_url":"https://pith.science/pith/XVEP5AS6XSRN27CESATSYW6F2O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XVEP5AS6XSRN27CESATSYW6F2O/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":"2026-08-16T17:24:13Z","links":{"resolver":"https://pith.science/pith/XVEP5AS6XSRN27CESATSYW6F2O","bundle":"https://pith.science/pith/XVEP5AS6XSRN27CESATSYW6F2O/bundle.json","state":"https://pith.science/pith/XVEP5AS6XSRN27CESATSYW6F2O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XVEP5AS6XSRN27CESATSYW6F2O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:XVEP5AS6XSRN27CESATSYW6F2O","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":"99b6882a997ff857110410fa2838c73bf13c0d3ab91ae848277706d8008394d1","cross_cats_sorted":["cs.AI","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-19T13:49:29Z","title_canon_sha256":"7e5f47b9471892bd2772e273026894e877b76b59368cd6a3cf61fdab5d0d4d92"},"schema_version":"1.0","source":{"id":"2010.09515","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.09515","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"arxiv_version","alias_value":"2010.09515v2","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.09515","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_12","alias_value":"XVEP5AS6XSRN","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_16","alias_value":"XVEP5AS6XSRN27CE","created_at":"2026-07-05T02:25:11Z"},{"alias_kind":"pith_short_8","alias_value":"XVEP5AS6","created_at":"2026-07-05T02:25:11Z"}],"graph_snapshots":[{"event_id":"sha256:da1fed680691a761d0ae02a44ac51674645eeef4c03e4ae9fea147f88a6c9881","target":"graph","created_at":"2026-07-05T02:25:11Z","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/2010.09515/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose methods to strengthen the invariance properties of representations obtained by contrastive learning. While existing approaches implicitly induce a degree of invariance as representations are learned, we look to more directly enforce invariance in the encoding process. To this end, we first introduce a training objective for contrastive learning that uses a novel regularizer to control how the representation changes under transformation. We show that representations trained with this objective perform better on downstream tasks and are more robust to the introduction of nuisance tran","authors_text":"Adam Foster, Rattana Pukdee, Tom Rainforth","cross_cats":["cs.AI","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-19T13:49:29Z","title":"Improving Transformation Invariance in Contrastive Representation Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.09515","kind":"arxiv","version":2},"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:a2036e601867416cdce01eacf39cbb1dd37694ef4a21584c968d97570cf6c1fe","target":"record","created_at":"2026-07-05T02:25:11Z","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":"99b6882a997ff857110410fa2838c73bf13c0d3ab91ae848277706d8008394d1","cross_cats_sorted":["cs.AI","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-19T13:49:29Z","title_canon_sha256":"7e5f47b9471892bd2772e273026894e877b76b59368cd6a3cf61fdab5d0d4d92"},"schema_version":"1.0","source":{"id":"2010.09515","kind":"arxiv","version":2}},"canonical_sha256":"bd48fe825ebca2dd7c4490272c5bc5d38b17e3ff8eea7db7949315bc51f46499","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd48fe825ebca2dd7c4490272c5bc5d38b17e3ff8eea7db7949315bc51f46499","first_computed_at":"2026-07-05T02:25:11.121720Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:25:11.121720Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zQlqJquGzVTiP/N1YvR1qESEskM82boaJ5lkRZmjUHoQDS4VDw83HqGUdB27M+yrZN+dJykmpkJncgBjOnNIAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:25:11.122145Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.09515","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2036e601867416cdce01eacf39cbb1dd37694ef4a21584c968d97570cf6c1fe","sha256:da1fed680691a761d0ae02a44ac51674645eeef4c03e4ae9fea147f88a6c9881"],"state_sha256":"83b03b7e59beba8d31646d448ad4af97e509dc475ed25f115bcdc9769a96e990"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pxIw3vuQXWToSfhANfMhCxdL7kA/jIwUOQeGN/qfGHDPRTDYpCSIs5SvV83F+VERvUpQ/aCI0CuR1c0cle/IBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T17:24:13.477653Z","bundle_sha256":"4a7e46cb8c24ef239170b0dbb9f4d535a713ad470fcc61ea55b8f2bb287983e7"}}