Pith Number

pith:LQBBE3AK

pith:2020:LQBBE3AK5GMEX63ZW7PFO6RQRA

not attested not anchored not stored refs pending

Cradles of the first stars: self-shielding, halo masses, and multiplicity

Danielle Skinner, John H. Wise

arxiv:2001.04480 v1 · 2020-01-13 · 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{LQBBE3AK5GMEX63ZW7PFO6RQRA}

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	2026-07-05T00:34:52.574301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c02126c0ae9984bfb79b7de577a30880cc7b056eb1a955e95efdf76777b3938

Aliases

arxiv: 2001.04480 · arxiv_version: 2001.04480v1 · doi: 10.48550/arxiv.2001.04480 · pith_short_12: LQBBE3AK5GME · pith_short_16: LQBBE3AK5GMEX63Z · pith_short_8: LQBBE3AK

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/LQBBE3AK5GMEX63ZW7PFO6RQRA \
  | 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: 5c02126c0ae9984bfb79b7de577a30880cc7b056eb1a955e95efdf76777b3938

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea84d07822b5aa45c720688c4a79a24f33a821d66522efa361fb767917ac3ebb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2020-01-13T19:00:09Z",
    "title_canon_sha256": "0078d2d4036110011e64f2cba4b079ce3c57cff04d46f78639b7dcd2018e3b97"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2001.04480",
    "kind": "arxiv",
    "version": 1
  }
}