Pith Number

pith:D7VCL3O6

pith:2026:D7VCL3O6OKKQH4VAZVZXFKI4J2

not attested not anchored not stored refs pending

No evolution in the number density of little red dots from cosmic dawn to cosmic noon

Alessandro Peca, Andrea Comastri, Anita Zanella, Colin Norman, Cristian Vignali, Eros Vanzella, Fabio Vito, Federica Loiacono, Francesco Calura, Gianni Zamorani, Giorgio Lanzuisi, Giovanni Mazzolari, Ignas Juod\v{z}balis, Isabella Prandoni, Ivan Delvecchio, Kazushi Iwasawa, Marcella Brusa, Marco Chiaberge, Marco Mignoli, Matilde Signorini, Matteo Sapori, Paolo Tozzi, Quirino D'Amato, Roberto Decarli, Roberto Gilli, Roberto Maiolino, Stefano Marchesi

arxiv:2606.30253 v1 · 2026-06-29 · astro-ph.GA · 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{D7VCL3O6OKKQH4VAZVZXFKI4J2}

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	2026-06-30T02:17:56.336352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fea25edde729503f2a0cd7372a91c4e9382deb3865b0f8072eae1a5de6ea89e

Aliases

arxiv: 2606.30253 · arxiv_version: 2606.30253v1 · doi: 10.48550/arxiv.2606.30253 · pith_short_12: D7VCL3O6OKKQ · pith_short_16: D7VCL3O6OKKQH4VA · pith_short_8: D7VCL3O6

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/D7VCL3O6OKKQH4VAZVZXFKI4J2 \
  | 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: 1fea25edde729503f2a0cd7372a91c4e9382deb3865b0f8072eae1a5de6ea89e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "025f10428200670b3071ceead9d9ca826ebaa3b61c82b2728ff2e916c34bf5d2",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-06-29T13:03:06Z",
    "title_canon_sha256": "d26d2bc69cff35498934d009c277047d2636e6f373a5060f0999a95384478b4b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.30253",
    "kind": "arxiv",
    "version": 1
  }
}