Pith Number

pith:HWNDCVRD

pith:2015:HWNDCVRD6TXTEN4RHF47X3CSFA

not attested not anchored not stored refs pending

Constraints on cosmological birefringence from Planck and Bicep2/Keck data

A.Gruppuso, D.Molinari, L.Pagano, M.Gerbino, N.Mandolesi, P.Natoli

arxiv:1509.04157 v1 · 2015-09-14 · 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{HWNDCVRD6TXTEN4RHF47X3CSFA}

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	2026-05-18T01:12:49.652361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3d9a315623f4ef3237913979fbec5228001f918ae4cc14d1105bcc8a2180e255

Aliases

arxiv: 1509.04157 · arxiv_version: 1509.04157v1 · doi: 10.48550/arxiv.1509.04157 · pith_short_12: HWNDCVRD6TXT · pith_short_16: HWNDCVRD6TXTEN4R · pith_short_8: HWNDCVRD

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/HWNDCVRD6TXTEN4RHF47X3CSFA \
  | 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: 3d9a315623f4ef3237913979fbec5228001f918ae4cc14d1105bcc8a2180e255

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11fca59783ed19d4fc80e4dcf6f58af3ca2cfb9c1e52b38564b495019f36b14b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-09-14T15:37:32Z",
    "title_canon_sha256": "dc30598fcaec5ba5b46acf252915e2643151aef59abfc06311863dda2f748c62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04157",
    "kind": "arxiv",
    "version": 1
  }
}