Pith Number

pith:BFOJZ74U

pith:2013:BFOJZ74UB2LPSWDQKC2GYR5U3C

not attested not anchored not stored refs pending

Cosmic microwave background constraints on the tensor-to-scalar ratio

Jiayu Tang, King Lau, M.-C. Chu

arxiv:1305.3921 v3 · 2013-05-16 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BFOJZ74UB2LPSWDQKC2GYR5U3C}

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	2026-05-18T02:50:43.073050Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

095c9cff940e96f9587050b46c47b4d896509968b23f728f00fe6fcc1afe5107

Aliases

arxiv: 1305.3921 · arxiv_version: 1305.3921v3 · doi: 10.48550/arxiv.1305.3921 · pith_short_12: BFOJZ74UB2LP · pith_short_16: BFOJZ74UB2LPSWDQ · pith_short_8: BFOJZ74U

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/BFOJZ74UB2LPSWDQKC2GYR5U3C \
  | 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: 095c9cff940e96f9587050b46c47b4d896509968b23f728f00fe6fcc1afe5107

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebf920cfdeed2cb08d505253f755693d70fa518f94e57b318b9e6da0678fba43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-16T20:00:56Z",
    "title_canon_sha256": "177e48087c76955da3c26f492c191807900bfd1e2a86dbc72db3c82f5a177c96"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.3921",
    "kind": "arxiv",
    "version": 3
  }
}