Pith Number

pith:3XQ7BYZ4

pith:2025:3XQ7BYZ43KFU2H2J5EHSZPLKRD

not attested not anchored not stored refs pending

Direct Collapse Pre-supermassive Black Hole Objects as Ly$\alpha$ Emitters

Isaac Shlosman (University of Kentucky), Yang Luo (Yunnan University)

arxiv:2506.18993 v2 · 2025-06-23 · 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{3XQ7BYZ43KFU2H2J5EHSZPLKRD}

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	2026-07-05T11:35:56.886501Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dde1f0e33cda8b4d1f49e90f2cbd6a88f4a8c3e2d761cc65c8d0b4969265b32b

Aliases

arxiv: 2506.18993 · arxiv_version: 2506.18993v2 · doi: 10.48550/arxiv.2506.18993 · pith_short_12: 3XQ7BYZ43KFU · pith_short_16: 3XQ7BYZ43KFU2H2J · pith_short_8: 3XQ7BYZ4

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/3XQ7BYZ43KFU2H2J5EHSZPLKRD \
  | 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: dde1f0e33cda8b4d1f49e90f2cbd6a88f4a8c3e2d761cc65c8d0b4969265b32b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6785e59e3e83dd67a790b1caed81e099876e5b26ecb478d5aedac1c721790a5c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-06-23T18:00:35Z",
    "title_canon_sha256": "56125e1c90185de9d3ca498bd0f490953eb7e3044233bb24eefede2fe8a50de3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.18993",
    "kind": "arxiv",
    "version": 2
  }
}