Pith Number

pith:DOIGG6RW

pith:2007:DOIGG6RW6VBBMBTUKQK2GFS6MD

not attested not anchored not stored refs pending

An Improved Procedure for Selecting the Profiles of Perfectly Matched Layers

Jiawei Zhang

arxiv:0711.3269 v1 · 2007-11-21 · math.NA · cs.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{DOIGG6RW6VBBMBTUKQK2GFS6MD}

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	2026-06-03T22:06:03.232800Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b90637a36f5421606745415a3165e60d26a674cbedf0d68581ba8d7ce6a36e3

Aliases

arxiv: 0711.3269 · arxiv_version: 0711.3269v1 · doi: 10.48550/arxiv.0711.3269 · pith_short_12: DOIGG6RW6VBB · pith_short_16: DOIGG6RW6VBBMBTU · pith_short_8: DOIGG6RW

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/DOIGG6RW6VBBMBTUKQK2GFS6MD \
  | 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: 1b90637a36f5421606745415a3165e60d26a674cbedf0d68581ba8d7ce6a36e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "345e9a4c46dae77ff1e43d468879443948ce5a01c00b9bb067d2abe75dd65d15",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "",
    "primary_cat": "math.NA",
    "submitted_at": "2007-11-21T07:32:02Z",
    "title_canon_sha256": "dce0fc3a68c61c682e9422c57f73ff375dd3350df787b6ce3253b815311db690"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0711.3269",
    "kind": "arxiv",
    "version": 1
  }
}