Pith Number

pith:67ULFKFY

pith:2007:67ULFKFY2C56T4D2H4ROPQ3WRU

not attested not anchored not stored refs pending

Regularization of spherical and axisymmetric evolution codes in numerical relativity

Dario Nunez, Miguel Alcubierre, Milton Ruiz

arxiv:0706.0923 v2 · 2007-06-06 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{67ULFKFY2C56T4D2H4ROPQ3WRU}

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	2026-07-04T15:24:17.678818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7e8b2a8b8d0bbe9f07a3f22e7c3768d2fc9ed04ad03c38e3b3da8c48eda7ce0

Aliases

arxiv: 0706.0923 · arxiv_version: 0706.0923v2 · doi: 10.48550/arxiv.0706.0923 · pith_short_12: 67ULFKFY2C56 · pith_short_16: 67ULFKFY2C56T4D2 · pith_short_8: 67ULFKFY

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/67ULFKFY2C56T4D2H4ROPQ3WRU \
  | 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: f7e8b2a8b8d0bbe9f07a3f22e7c3768d2fc9ed04ad03c38e3b3da8c48eda7ce0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ed02ec8b375d8f5b10e39d4fbc96084bfc94c725a7823370ee10cfe5afacd0a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2007-06-06T21:49:26Z",
    "title_canon_sha256": "1f7c8746234a5acf679ce381331d50febb5ca638adca66a3a3de56b8fb1e5fac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0706.0923",
    "kind": "arxiv",
    "version": 2
  }
}