Pith Number

pith:Q7WUMDQZ

pith:2004:Q7WUMDQZWTWWX5K6GUXXASVEKC

not attested not anchored not stored refs pending

Surfaces and orientations: much to fret about?

Ivan Rasnik, Sean A. McKinney, Taekjip Ha

arxiv:q-bio/0412013 v1 · 2004-12-07 · q-bio.BM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q7WUMDQZWTWWX5K6GUXXASVEKC}

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	2026-07-04T14:45:13.694399Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87ed460e19b4ed6bf55e352f704aa45094b7e8fd3978e67d180b2546704bc004

Aliases

arxiv: q-bio/0412013 · arxiv_version: q-bio/0412013v1 · doi: 10.48550/arxiv.q-bio/0412013 · pith_short_12: Q7WUMDQZWTWW · pith_short_16: Q7WUMDQZWTWWX5K6 · pith_short_8: Q7WUMDQZ

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/Q7WUMDQZWTWWX5K6GUXXASVEKC \
  | 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: 87ed460e19b4ed6bf55e352f704aa45094b7e8fd3978e67d180b2546704bc004

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04285845a2742877c7f4b1c551b06bc454d01f55ac3fe225f23026ab987ede52",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2004-12-07T02:39:38Z",
    "title_canon_sha256": "ec45ef4f795df7f26ba2277e22bd3a3da6e1d7abc66167714f58a5f144da49e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "q-bio/0412013",
    "kind": "arxiv",
    "version": 1
  }
}