Pith Number

pith:WQWR4NQ5

pith:2013:WQWR4NQ53MMZHJJXMCQMZ2EDRM

not attested not anchored not stored refs pending

Dark matter in galaxies: the dark matter particle mass is about 7 keV

H. J. de Vega, N. G. Sanchez

arxiv:1304.0759 v3 · 2013-04-02 · astro-ph.CO · hep-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{WQWR4NQ53MMZHJJXMCQMZ2EDRM}

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	2026-05-18T02:37:58.985964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b42d1e361ddb1993a53760a0cce8838b2330dc3cfa2d3a3840b7ecc199955484

Aliases

arxiv: 1304.0759 · arxiv_version: 1304.0759v3 · doi: 10.48550/arxiv.1304.0759 · pith_short_12: WQWR4NQ53MMZ · pith_short_16: WQWR4NQ53MMZHJJX · pith_short_8: WQWR4NQ5

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/WQWR4NQ53MMZHJJXMCQMZ2EDRM \
  | 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: b42d1e361ddb1993a53760a0cce8838b2330dc3cfa2d3a3840b7ecc199955484

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f45a23a2380c8bd1a9829a6a11b4d479ea7a539f17212ca570db7ba131f6e427",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-02T14:44:20Z",
    "title_canon_sha256": "aecc69fb40ae99a7c25f1ca40f2a090730acf33186a7b752a9fe92f503f2faf5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0759",
    "kind": "arxiv",
    "version": 3
  }
}