Pith Number

pith:MVVWM3C7

pith:2022:MVVWM3C7MLPBWJQGT2EE5SPSW7

not attested not anchored not stored refs pending

Is cosmic birefringence due to dark energy or dark matter? A tomographic approach

Eiichiro Komatsu, Hiromasa Nakatsuka, Toshiya Namikawa

arxiv:2203.08560 v1 · 2022-03-16 · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MVVWM3C7MLPBWJQGT2EE5SPSW7}

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	2026-07-05T04:35:45.400635Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

656b666c5f62de1b26069e884ec9f2b7d64554f519af41d87b51f2c5c04e546f

Aliases

arxiv: 2203.08560 · arxiv_version: 2203.08560v1 · doi: 10.48550/arxiv.2203.08560 · pith_short_12: MVVWM3C7MLPB · pith_short_16: MVVWM3C7MLPBWJQG · pith_short_8: MVVWM3C7

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/MVVWM3C7MLPBWJQGT2EE5SPSW7 \
  | 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: 656b666c5f62de1b26069e884ec9f2b7d64554f519af41d87b51f2c5c04e546f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0578ed2c277f6e1fd6e5cbb8050daaf36fdc7ab7a3e3ec9f1e880b10dd4f912b",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2022-03-16T11:47:54Z",
    "title_canon_sha256": "770c60f5a569724e113a7f64077606825af7c427b433be21bd81564ada52defa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.08560",
    "kind": "arxiv",
    "version": 1
  }
}