Pith Number

pith:MI5HVU2A

pith:2026:MI5HVU2AYZHNT7DKB2PFSAGLHF

not attested not anchored not stored refs pending

Supermassive black hole seeds from direct collapse of CDM-curvature peaks

Marco Bruni, Marco Galoppo, Tomohiro Harada

arxiv:2605.30145 v1 · 2026-05-28 · gr-qc · astro-ph.CO · 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{MI5HVU2AYZHNT7DKB2PFSAGLHF}

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	2026-05-29T02:06:11.041150Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

623a7ad340c64ed9fc6a0e9e5900cb3955f4d84fba58efc9d2e23fcaf040a699

Aliases

arxiv: 2605.30145 · arxiv_version: 2605.30145v1 · doi: 10.48550/arxiv.2605.30145 · pith_short_12: MI5HVU2AYZHN · pith_short_16: MI5HVU2AYZHNT7DK · pith_short_8: MI5HVU2A

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/MI5HVU2AYZHNT7DKB2PFSAGLHF \
  | 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: 623a7ad340c64ed9fc6a0e9e5900cb3955f4d84fba58efc9d2e23fcaf040a699

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ae2d2e446f7b5351d0b6ee2476a4ae826e538f6184fd2a6a08332157f906de3f",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-05-28T16:06:10Z",
    "title_canon_sha256": "44bc722b43c729549dc25c9009a95bf8a98a59fe9135ab0cdfbf1a532db68b17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.30145",
    "kind": "arxiv",
    "version": 1
  }
}