Pith Number

pith:Q4L4RR3K

pith:2020:Q4L4RR3K32566TYRC6HR3EYYJA

not attested not anchored not stored refs pending

CMB polarization as a tool to constrain the optical properties of the Universe

Alessandro Gruppuso, Francesco Forastieri, Luca Pagano, Margherita Lembo, Massimiliano Lattanzi, Paolo Natoli

arxiv:2007.08486 v2 · 2020-07-16 · 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{Q4L4RR3K32566TYRC6HR3EYYJA}

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	2026-07-05T02:56:23.453352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8717c8c76adebbef4f11178f1d93184821c665d77e26207b6b4897316c0b2655

Aliases

arxiv: 2007.08486 · arxiv_version: 2007.08486v2 · doi: 10.48550/arxiv.2007.08486 · pith_short_12: Q4L4RR3K3256 · pith_short_16: Q4L4RR3K32566TYR · pith_short_8: Q4L4RR3K

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/Q4L4RR3K32566TYRC6HR3EYYJA \
  | 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: 8717c8c76adebbef4f11178f1d93184821c665d77e26207b6b4897316c0b2655

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8843d76a339b45b5a5950dc8e55d5fff6403192d957a9721b1d28349b1e3e861",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2020-07-16T17:40:31Z",
    "title_canon_sha256": "c78cec78247082d41960c1c27782ce2ccd6b08d6cbaa0d5dba8d9c70e78d4818"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.08486",
    "kind": "arxiv",
    "version": 2
  }
}