{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:IS6M22QFV6T5CX347T5TNVS4LO","short_pith_number":"pith:IS6M22QF","canonical_record":{"source":{"id":"1007.3438","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-07-20T14:45:19Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"15c50a9a19fdcf42c442c2a86733f4f04ac39b76e89d955afbcdaf0af34c7a8c","abstract_canon_sha256":"e5700af28272baf5cc172a63549d4279caf5ff9f70d163ece054a6ddc35d9348"},"schema_version":"1.0"},"canonical_sha256":"44bccd6a05afa7d15f7cfcfb36d65c5b8884f98b1e92ff6382a2d502b3942bad","source":{"kind":"arxiv","id":"1007.3438","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.3438","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"arxiv_version","alias_value":"1007.3438v1","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.3438","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"pith_short_12","alias_value":"IS6M22QFV6T5","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IS6M22QFV6T5CX34","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IS6M22QF","created_at":"2026-05-18T12:26:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:IS6M22QFV6T5CX347T5TNVS4LO","target":"record","payload":{"canonical_record":{"source":{"id":"1007.3438","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-07-20T14:45:19Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"15c50a9a19fdcf42c442c2a86733f4f04ac39b76e89d955afbcdaf0af34c7a8c","abstract_canon_sha256":"e5700af28272baf5cc172a63549d4279caf5ff9f70d163ece054a6ddc35d9348"},"schema_version":"1.0"},"canonical_sha256":"44bccd6a05afa7d15f7cfcfb36d65c5b8884f98b1e92ff6382a2d502b3942bad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:39.177125Z","signature_b64":"6En6d9F63KRv2Se20OMH5L2MdGLCtVIuTyD6aBKc6qjbMGxBi1bO5ZqEhclJe3BDiVmkDTBK3Cs90jen5B18BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44bccd6a05afa7d15f7cfcfb36d65c5b8884f98b1e92ff6382a2d502b3942bad","last_reissued_at":"2026-05-18T04:33:39.176652Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:39.176652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.3438","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":"2026-05-18T04:33:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yNhBxh0Y2twubhkZYiQrqrPWkX2mG6aw19+3xJDsnNQFMiCt6NuGcV9KwraoeowhYwj3Mvz+oa7D4pAq4OIhCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:49:47.937964Z"},"content_sha256":"998ae9fefd31c0da1a1edda9d1f413fac20a9c9eb35a46129b4ab33326130012","schema_version":"1.0","event_id":"sha256:998ae9fefd31c0da1a1edda9d1f413fac20a9c9eb35a46129b4ab33326130012"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:IS6M22QFV6T5CX347T5TNVS4LO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Doppelganger defects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"hep-th","authors_text":"Daniel Wesley, Mark Trodden, Matt Lewandowski, Melinda Andrews","submitted_at":"2010-07-20T14:45:19Z","abstract_excerpt":"We study k-defects - topological defects in theories with more than two derivatives and second-order equations of motion - and describe some striking ways in which these defects both resemble and differ from their analogues in canonical scalar field theories. We show that, for some models, the homotopy structure of the vacuum manifold is insufficient to establish the existence of k-defects, in contrast to the canonical case. These results also constrain certain families of DBI instanton solutions in the 4-dimensional effective theory. We then describe a class of k-defect solutions, which we du"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.3438","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":""},"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":"2026-05-18T04:33:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UFSrH0NUIdLDrYbhxQamai6J5sKqcrw2EXmeMd8ffAtFbIOTmS9LKjypX+JZXCBhjdgD6iX0HcmkOvbuTeyhCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:49:47.938305Z"},"content_sha256":"48568ed3c5e52b43178e5efb6181cf8f1a4615a9107ed801989a8dd57d5eca17","schema_version":"1.0","event_id":"sha256:48568ed3c5e52b43178e5efb6181cf8f1a4615a9107ed801989a8dd57d5eca17"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IS6M22QFV6T5CX347T5TNVS4LO/bundle.json","state_url":"https://pith.science/pith/IS6M22QFV6T5CX347T5TNVS4LO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IS6M22QFV6T5CX347T5TNVS4LO/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":"2026-06-05T12:49:47Z","links":{"resolver":"https://pith.science/pith/IS6M22QFV6T5CX347T5TNVS4LO","bundle":"https://pith.science/pith/IS6M22QFV6T5CX347T5TNVS4LO/bundle.json","state":"https://pith.science/pith/IS6M22QFV6T5CX347T5TNVS4LO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IS6M22QFV6T5CX347T5TNVS4LO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:IS6M22QFV6T5CX347T5TNVS4LO","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":"e5700af28272baf5cc172a63549d4279caf5ff9f70d163ece054a6ddc35d9348","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-07-20T14:45:19Z","title_canon_sha256":"15c50a9a19fdcf42c442c2a86733f4f04ac39b76e89d955afbcdaf0af34c7a8c"},"schema_version":"1.0","source":{"id":"1007.3438","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.3438","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"arxiv_version","alias_value":"1007.3438v1","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.3438","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"pith_short_12","alias_value":"IS6M22QFV6T5","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_16","alias_value":"IS6M22QFV6T5CX34","created_at":"2026-05-18T12:26:09Z"},{"alias_kind":"pith_short_8","alias_value":"IS6M22QF","created_at":"2026-05-18T12:26:09Z"}],"graph_snapshots":[{"event_id":"sha256:48568ed3c5e52b43178e5efb6181cf8f1a4615a9107ed801989a8dd57d5eca17","target":"graph","created_at":"2026-05-18T04:33:39Z","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":"We study k-defects - topological defects in theories with more than two derivatives and second-order equations of motion - and describe some striking ways in which these defects both resemble and differ from their analogues in canonical scalar field theories. We show that, for some models, the homotopy structure of the vacuum manifold is insufficient to establish the existence of k-defects, in contrast to the canonical case. These results also constrain certain families of DBI instanton solutions in the 4-dimensional effective theory. We then describe a class of k-defect solutions, which we du","authors_text":"Daniel Wesley, Mark Trodden, Matt Lewandowski, Melinda Andrews","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-07-20T14:45:19Z","title":"Doppelganger defects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.3438","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":"sha256:998ae9fefd31c0da1a1edda9d1f413fac20a9c9eb35a46129b4ab33326130012","target":"record","created_at":"2026-05-18T04:33:39Z","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":"e5700af28272baf5cc172a63549d4279caf5ff9f70d163ece054a6ddc35d9348","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2010-07-20T14:45:19Z","title_canon_sha256":"15c50a9a19fdcf42c442c2a86733f4f04ac39b76e89d955afbcdaf0af34c7a8c"},"schema_version":"1.0","source":{"id":"1007.3438","kind":"arxiv","version":1}},"canonical_sha256":"44bccd6a05afa7d15f7cfcfb36d65c5b8884f98b1e92ff6382a2d502b3942bad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"44bccd6a05afa7d15f7cfcfb36d65c5b8884f98b1e92ff6382a2d502b3942bad","first_computed_at":"2026-05-18T04:33:39.176652Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:33:39.176652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6En6d9F63KRv2Se20OMH5L2MdGLCtVIuTyD6aBKc6qjbMGxBi1bO5ZqEhclJe3BDiVmkDTBK3Cs90jen5B18BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:33:39.177125Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.3438","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:998ae9fefd31c0da1a1edda9d1f413fac20a9c9eb35a46129b4ab33326130012","sha256:48568ed3c5e52b43178e5efb6181cf8f1a4615a9107ed801989a8dd57d5eca17"],"state_sha256":"eb48db662c5a6eab4628483c05b56cfdd090dd8323324da9c16fe93e02ece3e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4zZQzh6jiZK53KXTuUkwSdNueW91O9CPQt8MbERcNeeBBDl6uMKio9gNOptYv9Z+vVb1TVZrTkBqZeWa4p/PAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:49:47.940191Z","bundle_sha256":"b4fb80602f1beed39e0569c12a501d2853b9ff5cda1c5cb1f5db6aab02e86965"}}