{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:GT2VRB6ZIJF7YOIEC3STKKNRT7","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":"cb00b44e52b0269499ef879545d80d4a0d3508c4d6ea5f06208cd38fa92b2386","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-01-20T16:15:14Z","title_canon_sha256":"8ed13d2a5bbc746c5210f88e8336772bd8ca588ee92056bf1ab2a71dd2d4f318"},"schema_version":"1.0","source":{"id":"1201.4738","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.4738","created_at":"2026-05-18T04:04:05Z"},{"alias_kind":"arxiv_version","alias_value":"1201.4738v1","created_at":"2026-05-18T04:04:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.4738","created_at":"2026-05-18T04:04:05Z"},{"alias_kind":"pith_short_12","alias_value":"GT2VRB6ZIJF7","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_16","alias_value":"GT2VRB6ZIJF7YOIE","created_at":"2026-05-18T12:27:06Z"},{"alias_kind":"pith_short_8","alias_value":"GT2VRB6Z","created_at":"2026-05-18T12:27:06Z"}],"graph_snapshots":[{"event_id":"sha256:a8275625e187ebba55125b995a17a92ffc3be319e599f5197ad96ec4105d663e","target":"graph","created_at":"2026-05-18T04:04:05Z","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":"The class of skewon-axion media can be defined in a simple and natural manner applying four-dimensional differential-form representation of electromagnetic fields and media. It has been recently shown that an interface of a uniaxial skewon-axion medium acts as a DB boundary requiring vanishing normal components of the D and B vectors. In the present paper a more general skewon-axion medium is considered. It is shown that a planar interface of such a medium acts as a boundary generalizing both soft-and-hard (SH) and DB boundary conditions to SHDB conditions. Reflection of a plane wave from a pl","authors_text":"Ari Sihvola, Ismo V. Lindell","cross_cats":["math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-01-20T16:15:14Z","title":"Skewon-Axion Medium and Soft-and-Hard/DB Boundary Condition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.4738","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:fead1fdc94f5851fb81b81ea3867eb61e25b64e3b232aaf2e5b5e6931bfe7734","target":"record","created_at":"2026-05-18T04:04:05Z","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":"cb00b44e52b0269499ef879545d80d4a0d3508c4d6ea5f06208cd38fa92b2386","cross_cats_sorted":["math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-01-20T16:15:14Z","title_canon_sha256":"8ed13d2a5bbc746c5210f88e8336772bd8ca588ee92056bf1ab2a71dd2d4f318"},"schema_version":"1.0","source":{"id":"1201.4738","kind":"arxiv","version":1}},"canonical_sha256":"34f55887d9424bfc390416e53529b19fe5ff8d6c84f52e199e4aa0d08fddf339","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"34f55887d9424bfc390416e53529b19fe5ff8d6c84f52e199e4aa0d08fddf339","first_computed_at":"2026-05-18T04:04:05.302704Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:04:05.302704Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MXTmIPsZsqC2w8Xto4nce9eUisI7+8dEhDiVCOwyiRq9j5/+ONQuP/o2qwIMYFg9XhOUPocB8nAqnbbC5JLnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:04:05.303205Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.4738","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fead1fdc94f5851fb81b81ea3867eb61e25b64e3b232aaf2e5b5e6931bfe7734","sha256:a8275625e187ebba55125b995a17a92ffc3be319e599f5197ad96ec4105d663e"],"state_sha256":"0a19701161c1ef3a8ce3d2dc575072f265653dccdcf6c9a67c22cf0ac2bee153"}