{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:XE77JMIQOZCXX3T7C5JCRR7QAL","short_pith_number":"pith:XE77JMIQ","canonical_record":{"source":{"id":"1504.01792","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2015-04-08T00:37:47Z","cross_cats_sorted":[],"title_canon_sha256":"14705371dc81cc73481633dbaa7fb4b9416c8096f09fb2cf31f8e363bfcc8461","abstract_canon_sha256":"d1f089e583306d60b2a9b0a686d20f19c884b0773710efdd5e13dbab21e50379"},"schema_version":"1.0"},"canonical_sha256":"b93ff4b11076457bee7f175228c7f002ddd9501555ff6c9633d085c36b283b8a","source":{"kind":"arxiv","id":"1504.01792","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01792","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01792v1","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01792","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"XE77JMIQOZCX","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XE77JMIQOZCXX3T7","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XE77JMIQ","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:XE77JMIQOZCXX3T7C5JCRR7QAL","target":"record","payload":{"canonical_record":{"source":{"id":"1504.01792","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2015-04-08T00:37:47Z","cross_cats_sorted":[],"title_canon_sha256":"14705371dc81cc73481633dbaa7fb4b9416c8096f09fb2cf31f8e363bfcc8461","abstract_canon_sha256":"d1f089e583306d60b2a9b0a686d20f19c884b0773710efdd5e13dbab21e50379"},"schema_version":"1.0"},"canonical_sha256":"b93ff4b11076457bee7f175228c7f002ddd9501555ff6c9633d085c36b283b8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:18.352421Z","signature_b64":"A16/tsMhI3kvnLqWQl64DKo2Fj6RVfQU8Q3YHnONrZnXWTPh613zSEqEOHKdvN8YcRimCWaaOmhoDnPf2HHABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b93ff4b11076457bee7f175228c7f002ddd9501555ff6c9633d085c36b283b8a","last_reissued_at":"2026-05-18T02:19:18.351828Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:18.351828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.01792","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":"2026-05-18T02:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xI28HJ61PkwUS4KiGEHOxNbdnqnY00KGQWXmYZzXPqff1Jj5XW6aU23Y1QdgnJpePzHai0/U7NT6vI8W78FNBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:40:05.014841Z"},"content_sha256":"f28f8f92af7c82905e896df2d756b0ad67501ab4fe6c05f3254971a74e838981","schema_version":"1.0","event_id":"sha256:f28f8f92af7c82905e896df2d756b0ad67501ab4fe6c05f3254971a74e838981"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:XE77JMIQOZCXX3T7C5JCRR7QAL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling Maintenance of Long-Term Potentiation in Clustered Synapses, Long-Term Memory Without Bistability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.NC","authors_text":"Paul Smolen","submitted_at":"2015-04-08T00:37:47Z","abstract_excerpt":"Memories are stored, at least partly, as patterns of strong synapses. Given molecular turnover, how can synapses maintain strong for the years that memories can persist? Some models postulate that biochemical bistability maintains strong synapses. However, bistability should give a bimodal distribution of synaptic strength or weight, whereas current data show unimodal distributions for weights and for a correlated variable, dendritic spine volume. Bistability of single synapses has also never been empirically demonstrated. Thus it is important for models to simulate both unimodal distributions"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01792","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":"2026-05-18T02:19:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hxLYS25yYHInr291Q3VBC7d613zWBFHNcRb6UAcxiaeerilOvAeCf09lFiDrvua/O917MkdJOYrvvEPHklmdAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T14:40:05.015200Z"},"content_sha256":"341b511fa2b7248e4327031261a02d19abc70529af1e6444b3b53bf14d635da2","schema_version":"1.0","event_id":"sha256:341b511fa2b7248e4327031261a02d19abc70529af1e6444b3b53bf14d635da2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/bundle.json","state_url":"https://pith.science/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/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":"2026-06-11T14:40:05Z","links":{"resolver":"https://pith.science/pith/XE77JMIQOZCXX3T7C5JCRR7QAL","bundle":"https://pith.science/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/bundle.json","state":"https://pith.science/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XE77JMIQOZCXX3T7C5JCRR7QAL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XE77JMIQOZCXX3T7C5JCRR7QAL","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":"d1f089e583306d60b2a9b0a686d20f19c884b0773710efdd5e13dbab21e50379","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2015-04-08T00:37:47Z","title_canon_sha256":"14705371dc81cc73481633dbaa7fb4b9416c8096f09fb2cf31f8e363bfcc8461"},"schema_version":"1.0","source":{"id":"1504.01792","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.01792","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"arxiv_version","alias_value":"1504.01792v1","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.01792","created_at":"2026-05-18T02:19:18Z"},{"alias_kind":"pith_short_12","alias_value":"XE77JMIQOZCX","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XE77JMIQOZCXX3T7","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XE77JMIQ","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:341b511fa2b7248e4327031261a02d19abc70529af1e6444b3b53bf14d635da2","target":"graph","created_at":"2026-05-18T02:19:18Z","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":"Memories are stored, at least partly, as patterns of strong synapses. Given molecular turnover, how can synapses maintain strong for the years that memories can persist? Some models postulate that biochemical bistability maintains strong synapses. However, bistability should give a bimodal distribution of synaptic strength or weight, whereas current data show unimodal distributions for weights and for a correlated variable, dendritic spine volume. Bistability of single synapses has also never been empirically demonstrated. Thus it is important for models to simulate both unimodal distributions","authors_text":"Paul Smolen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2015-04-08T00:37:47Z","title":"Modeling Maintenance of Long-Term Potentiation in Clustered Synapses, Long-Term Memory Without Bistability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.01792","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:f28f8f92af7c82905e896df2d756b0ad67501ab4fe6c05f3254971a74e838981","target":"record","created_at":"2026-05-18T02:19:18Z","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":"d1f089e583306d60b2a9b0a686d20f19c884b0773710efdd5e13dbab21e50379","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2015-04-08T00:37:47Z","title_canon_sha256":"14705371dc81cc73481633dbaa7fb4b9416c8096f09fb2cf31f8e363bfcc8461"},"schema_version":"1.0","source":{"id":"1504.01792","kind":"arxiv","version":1}},"canonical_sha256":"b93ff4b11076457bee7f175228c7f002ddd9501555ff6c9633d085c36b283b8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b93ff4b11076457bee7f175228c7f002ddd9501555ff6c9633d085c36b283b8a","first_computed_at":"2026-05-18T02:19:18.351828Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:18.351828Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A16/tsMhI3kvnLqWQl64DKo2Fj6RVfQU8Q3YHnONrZnXWTPh613zSEqEOHKdvN8YcRimCWaaOmhoDnPf2HHABA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:18.352421Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.01792","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f28f8f92af7c82905e896df2d756b0ad67501ab4fe6c05f3254971a74e838981","sha256:341b511fa2b7248e4327031261a02d19abc70529af1e6444b3b53bf14d635da2"],"state_sha256":"f74bbea7571710d8be6b1eece791e81066475939e80b7fd8d91d37b47d2878a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bKVO+gbOV1U3tUvHAju9PRq2XVRF2bEcRtXvAfodj50FuQwZsuLOktah7cOfDbxHBlSlHUWE0NF2DcPM0DqwDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T14:40:05.017233Z","bundle_sha256":"53641ada13afc62292c4328db3a9e6e46273dbdd7babddf065d8303ebf446d2b"}}