Pith Number

pith:JZJXD5HY

pith:2018:JZJXD5HYTSLK5W67CBCX5XSISM

not attested not anchored not stored refs pending

A Reflectionless Discrete Perfectly Matched Layer

Albert Chern

arxiv:1804.01390 v2 · 2018-04-04 · math.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JZJXD5HYTSLK5W67CBCX5XSISM}

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.

Receipt and verification

First computed	2026-05-17T23:51:44.262370Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e5371f4f89c96aedbdf10457ede489303835b101060aebe87eb2ee27e324b9f

Aliases

arxiv: 1804.01390 · arxiv_version: 1804.01390v2 · doi: 10.48550/arxiv.1804.01390 · pith_short_12: JZJXD5HYTSLK · pith_short_16: JZJXD5HYTSLK5W67 · pith_short_8: JZJXD5HY

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/JZJXD5HYTSLK5W67CBCX5XSISM \
  | 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: 4e5371f4f89c96aedbdf10457ede489303835b101060aebe87eb2ee27e324b9f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "921c59111a2764ba584e61aa1bb686f892e90dfb58800cb284a9119552050e46",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-04T13:29:22Z",
    "title_canon_sha256": "1e3b780c29ca5f251e962c62fd4fcca6712faa473a03045ff8f1a317c4db2104"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.01390",
    "kind": "arxiv",
    "version": 2
  }
}