Pith Number

pith:B3BV4672

pith:2023:B3BV4672IYK2ZS6SJRNHLNSCLK

not attested not anchored not stored refs pending

Who knows what dark matter lurks in the heart of M87: The shadow knows, and so does the ringdown

Gabor Kunstatter, Ramin G. Daghigh

arxiv:2308.15682 v2 · 2023-08-30 · gr-qc · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B3BV4672IYK2ZS6SJRNHLNSCLK}

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	2026-07-05T07:42:19.651352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ec35e7bfa4615accbd24c5a75b6425abdd474e3b98bd398c4fd6e59fdef8265

Aliases

arxiv: 2308.15682 · arxiv_version: 2308.15682v2 · doi: 10.48550/arxiv.2308.15682 · pith_short_12: B3BV4672IYK2 · pith_short_16: B3BV4672IYK2ZS6S · pith_short_8: B3BV4672

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/B3BV4672IYK2ZS6SJRNHLNSCLK \
  | 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: 0ec35e7bfa4615accbd24c5a75b6425abdd474e3b98bd398c4fd6e59fdef8265

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3541f1df387e49d0cd32ee9bb0886d8c6c966f8367b4f6110e2e11162d69dd41",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2023-08-30T00:43:44Z",
    "title_canon_sha256": "fa41c8ebc9606cae969679f30830e4e6c3ecd7947e149a70810f5d8b158c3054"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2308.15682",
    "kind": "arxiv",
    "version": 2
  }
}