Pith Number

pith:6VJ2AHID

pith:2004:6VJ2AHIDRX2MCDZNK5QGCEPZXD

not attested not anchored not stored refs pending

A First Principles Density-Functional Calculation of the Electronic and Vibrational Structure of the Key Melanin Monomers

B. J. Powell, K. Brake, M. R. Pederson, N. Bernstein, P. Meredith, Ross H. McKenzie, T. Baruah

arxiv:q-bio/0401030 v1 · 2004-01-23 · q-bio.BM · cond-mat.mtrl-sci · cond-mat.soft · physics.bio-ph · physics.chem-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{6VJ2AHIDRX2MCDZNK5QGCEPZXD}

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	2026-05-18T01:05:07.160569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f553a01d038df4c10f2d57606111f9b8fc7e12127607274e5893ecd653af3a56

Aliases

arxiv: q-bio/0401030 · arxiv_version: q-bio/0401030v1 · doi: 10.48550/arxiv.q-bio/0401030 · pith_short_12: 6VJ2AHIDRX2M · pith_short_16: 6VJ2AHIDRX2MCDZN · pith_short_8: 6VJ2AHID

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/6VJ2AHIDRX2MCDZNK5QGCEPZXD \
  | 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: f553a01d038df4c10f2d57606111f9b8fc7e12127607274e5893ecd653af3a56

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f9ee1c88e50a7cded1470da7ddb03033d9560f27ece0f2c6dd9e4963772d683",
    "cross_cats_sorted": [
      "cond-mat.mtrl-sci",
      "cond-mat.soft",
      "physics.bio-ph",
      "physics.chem-ph"
    ],
    "license": "",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2004-01-23T04:02:29Z",
    "title_canon_sha256": "2141a56652de3c3996b04f86ba704e444cd3549f052ca1456c87c5f47547c9c8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "q-bio/0401030",
    "kind": "arxiv",
    "version": 1
  }
}