Pith. sign in
Pith Number

pith:OF54VWIB

pith:2021:OF54VWIB2WWS6UH5IGAMEFRW43
not attested not anchored not stored refs pending

Notes on Perfectly Matched Layers (PMLs)

Steven G. Johnson

arxiv:2108.05348 v1 · 2021-08-04 · cs.CE · physics.comp-ph

Add to your LaTeX paper
\usepackage{pith}
\pithnumber{OF54VWIB2WWS6UH5IGAMEFRW43}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp
2 Internet Archive
3 Author claim open · sign in to claim
4 Citations open
5 Replications open
Portable graph bundle live · download bundle · merged state
The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

4 papers in Pith

Receipt and verification
First computed 2026-07-05T03:05:08.892646Z
Builder pith-number-builder-2026-05-17-v1
Signature Pith Ed25519 (pith-v1-2026-05) · public key
Schema pith-number/v1.0

Canonical hash

717bcad901d5ad2f50fd4180c21636e6c969ecba631c7298f33c19e6838bd6c6

Aliases

arxiv: 2108.05348 · arxiv_version: 2108.05348v1 · doi: 10.48550/arxiv.2108.05348 · pith_short_12: OF54VWIB2WWS · pith_short_16: OF54VWIB2WWS6UH5 · pith_short_8: OF54VWIB
Agent API
Verify this Pith Number yourself
curl -sH 'Accept: application/ld+json' https://pith.science/pith/OF54VWIB2WWS6UH5IGAMEFRW43 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 717bcad901d5ad2f50fd4180c21636e6c969ecba631c7298f33c19e6838bd6c6
Canonical record JSON
{
  "metadata": {
    "abstract_canon_sha256": "3fea4fbf096f2b8bf00a13c3ea250906063eee5735aca04bbe3de243f7bf9869",
    "cross_cats_sorted": [
      "physics.comp-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CE",
    "submitted_at": "2021-08-04T14:07:13Z",
    "title_canon_sha256": "243c2ab334490c8765fe7b01c7d85d3bcf67ad489687ab660acf4aeb8ae8b3bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2108.05348",
    "kind": "arxiv",
    "version": 1
  }
}