Pith Number

pith:XBR7HDHV

pith:2013:XBR7HDHVHBTGYDXG26FYTKV3QA

not attested not anchored not stored refs pending

Neutrino and Dark Radiation properties in light of latest CMB observations

Alessandro Melchiorri, Elena Giusarma, Maria Archidiacono, Olga Mena

arxiv:1303.0143 v1 · 2013-03-01 · 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{XBR7HDHVHBTGYDXG26FYTKV3QA}

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	2026-05-18T03:24:41.309831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b863f38cf538666c0ee6d78b89aabb801df256845065850bec539b5ed8181a8b

Aliases

arxiv: 1303.0143 · arxiv_version: 1303.0143v1 · doi: 10.48550/arxiv.1303.0143 · pith_short_12: XBR7HDHVHBTG · pith_short_16: XBR7HDHVHBTGYDXG · pith_short_8: XBR7HDHV

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/XBR7HDHVHBTGYDXG26FYTKV3QA \
  | 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: b863f38cf538666c0ee6d78b89aabb801df256845065850bec539b5ed8181a8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a261360af8b4c3dd07a8e6789e66bf73659968b436ff4b2486fb220b1ea888d7",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-03-01T11:04:59Z",
    "title_canon_sha256": "f0bf984fde9da84867428b4bf524b8a983bb654f399f559d6f678fb0c0ed534a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.0143",
    "kind": "arxiv",
    "version": 1
  }
}