Pith Number

pith:QBKEGDEX

pith:2005:QBKEGDEXCIGG73ZHOB4OB74WSQ

not attested not anchored not stored refs pending

On Precision Measurement of the Mean Curvature

Lloyd Knox (UC Davis)

arxiv:astro-ph/0503405 v2 · 2005-03-18 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QBKEGDEXCIGG73ZHOB4OB74WSQ}

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	2026-07-04T15:19:35.035926Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8054430c97120c6fef277078e0ff9694112804f2281ec3a1e1f1227d60b4db21

Aliases

arxiv: astro-ph/0503405 · arxiv_version: astro-ph/0503405v2 · doi: 10.48550/arxiv.astro-ph/0503405 · pith_short_12: QBKEGDEXCIGG · pith_short_16: QBKEGDEXCIGG73ZH · pith_short_8: QBKEGDEX

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/QBKEGDEXCIGG73ZHOB4OB74WSQ \
  | 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: 8054430c97120c6fef277078e0ff9694112804f2281ec3a1e1f1227d60b4db21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a90a6994fefb09b9b7b3c055ea9fbf51581e4285e43eb36b9ea2828ab2750ada",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-03-18T00:55:03Z",
    "title_canon_sha256": "68fa67650725eefaa56b8dc49cce9cb0192294c7d68406eafa06132a5b61980b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0503405",
    "kind": "arxiv",
    "version": 2
  }
}