{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:U56YMJPTHGEMA6TTOJS5MZKJBS","short_pith_number":"pith:U56YMJPT","canonical_record":{"source":{"id":"1512.02403","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-12-08T11:07:29Z","cross_cats_sorted":[],"title_canon_sha256":"48de83fc0191a97344a8b94de1cde573985f73b502b6b51dc3bbeb1b3ec034d2","abstract_canon_sha256":"3b086c4c536f539840ea8a2779fe4ff9828e5e5147ebc994b962541253770c33"},"schema_version":"1.0"},"canonical_sha256":"a77d8625f33988c07a737265d665490c98bc38249dd64fed6a181cab2f0d4e9a","source":{"kind":"arxiv","id":"1512.02403","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.02403","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"arxiv_version","alias_value":"1512.02403v1","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.02403","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"pith_short_12","alias_value":"U56YMJPTHGEM","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"U56YMJPTHGEMA6TT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"U56YMJPT","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:U56YMJPTHGEMA6TTOJS5MZKJBS","target":"record","payload":{"canonical_record":{"source":{"id":"1512.02403","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-12-08T11:07:29Z","cross_cats_sorted":[],"title_canon_sha256":"48de83fc0191a97344a8b94de1cde573985f73b502b6b51dc3bbeb1b3ec034d2","abstract_canon_sha256":"3b086c4c536f539840ea8a2779fe4ff9828e5e5147ebc994b962541253770c33"},"schema_version":"1.0"},"canonical_sha256":"a77d8625f33988c07a737265d665490c98bc38249dd64fed6a181cab2f0d4e9a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:44.760400Z","signature_b64":"4qt8nKhT0RUSu0QgqW5r/f/N45NyMI9Xrp7/MRXUY2/t4/QzoGZ7KrrSRFbEJzdAvMyjqVR9+SmH2mlymiyhDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a77d8625f33988c07a737265d665490c98bc38249dd64fed6a181cab2f0d4e9a","last_reissued_at":"2026-05-18T01:24:44.759904Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:44.759904Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.02403","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":"2026-05-18T01:24:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iMWnQTvf98Lxj+DTodl6jtKDX+XWrwBsJH3JRNr1gFTF6BV86+73hCjrAzc+qewz5D+2RjGYSj+hXZRN7z/uAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:48:44.935958Z"},"content_sha256":"3bb5bf9c2cb2b4b80c8f964395e0dbae4b15148d4d3cb213deaad740d7239281","schema_version":"1.0","event_id":"sha256:3bb5bf9c2cb2b4b80c8f964395e0dbae4b15148d4d3cb213deaad740d7239281"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:U56YMJPTHGEMA6TTOJS5MZKJBS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The contact mechanics challenge: Problem definition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Martin H. M\\\"user, Wolf B. Dapp","submitted_at":"2015-12-08T11:07:29Z","abstract_excerpt":"We present a contact mechanics problem, which we consider to be representative for contacts between nominally flat surfaces. The main ingredients of the mathematically fully defined contact problem are: Self-affine roughness, linear elasticity, the small-slope approximation, and short-range adhesion between the frictionless surfaces. Surface energies, elastic contact modulus and computer-generated surface topographies are provided at www.lms.uni-saarland.de/contact-mechanics-challenge. To minimize the undesirable but frequent problem of unit conversion errors, we provide some benchmark results"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.02403","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":"2026-05-18T01:24:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mQ1dd9RET9+7mWHR+PcFqCN3QNIRpYLiuBTab2F9qEswBoQRIBSQkcwnlIbSeVtvm7tuv68vdUAtyNALYH09Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T00:48:44.936497Z"},"content_sha256":"1b3eac5b8853e09102458a37f8686e5333101d455b5e5c8ecef69df726f40f1c","schema_version":"1.0","event_id":"sha256:1b3eac5b8853e09102458a37f8686e5333101d455b5e5c8ecef69df726f40f1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/bundle.json","state_url":"https://pith.science/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/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":"2026-05-23T00:48:44Z","links":{"resolver":"https://pith.science/pith/U56YMJPTHGEMA6TTOJS5MZKJBS","bundle":"https://pith.science/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/bundle.json","state":"https://pith.science/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U56YMJPTHGEMA6TTOJS5MZKJBS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:U56YMJPTHGEMA6TTOJS5MZKJBS","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":"3b086c4c536f539840ea8a2779fe4ff9828e5e5147ebc994b962541253770c33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-12-08T11:07:29Z","title_canon_sha256":"48de83fc0191a97344a8b94de1cde573985f73b502b6b51dc3bbeb1b3ec034d2"},"schema_version":"1.0","source":{"id":"1512.02403","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.02403","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"arxiv_version","alias_value":"1512.02403v1","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.02403","created_at":"2026-05-18T01:24:44Z"},{"alias_kind":"pith_short_12","alias_value":"U56YMJPTHGEM","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"U56YMJPTHGEMA6TT","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"U56YMJPT","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:1b3eac5b8853e09102458a37f8686e5333101d455b5e5c8ecef69df726f40f1c","target":"graph","created_at":"2026-05-18T01:24:44Z","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 present a contact mechanics problem, which we consider to be representative for contacts between nominally flat surfaces. The main ingredients of the mathematically fully defined contact problem are: Self-affine roughness, linear elasticity, the small-slope approximation, and short-range adhesion between the frictionless surfaces. Surface energies, elastic contact modulus and computer-generated surface topographies are provided at www.lms.uni-saarland.de/contact-mechanics-challenge. To minimize the undesirable but frequent problem of unit conversion errors, we provide some benchmark results","authors_text":"Martin H. M\\\"user, Wolf B. Dapp","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-12-08T11:07:29Z","title":"The contact mechanics challenge: Problem definition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.02403","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":"sha256:3bb5bf9c2cb2b4b80c8f964395e0dbae4b15148d4d3cb213deaad740d7239281","target":"record","created_at":"2026-05-18T01:24:44Z","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":"3b086c4c536f539840ea8a2779fe4ff9828e5e5147ebc994b962541253770c33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2015-12-08T11:07:29Z","title_canon_sha256":"48de83fc0191a97344a8b94de1cde573985f73b502b6b51dc3bbeb1b3ec034d2"},"schema_version":"1.0","source":{"id":"1512.02403","kind":"arxiv","version":1}},"canonical_sha256":"a77d8625f33988c07a737265d665490c98bc38249dd64fed6a181cab2f0d4e9a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a77d8625f33988c07a737265d665490c98bc38249dd64fed6a181cab2f0d4e9a","first_computed_at":"2026-05-18T01:24:44.759904Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:44.759904Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4qt8nKhT0RUSu0QgqW5r/f/N45NyMI9Xrp7/MRXUY2/t4/QzoGZ7KrrSRFbEJzdAvMyjqVR9+SmH2mlymiyhDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:44.760400Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.02403","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3bb5bf9c2cb2b4b80c8f964395e0dbae4b15148d4d3cb213deaad740d7239281","sha256:1b3eac5b8853e09102458a37f8686e5333101d455b5e5c8ecef69df726f40f1c"],"state_sha256":"7e3a1eafbb5c16896b2227ea1a24fb4399881f3f307312db4deaab9e0651e8a9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tzCtwj10UzKfPZQ+ufMaYQ5dJs+iJIq/jl4fB2JpjgUS7JitROXfcWFeR3z+6hwxu5CCp30vSSkeo6CBP5FCDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T00:48:44.939901Z","bundle_sha256":"4ee431ae7deab3d7cacebd8ebae5ed668d8cab25f08201318efc35d9c5e437d1"}}