Pith Number

pith:4HKW2UJX

pith:2014:4HKW2UJXUPPEC2HAYQOJZRI5FY

not attested not anchored not stored refs pending

Can the 21 cm signal probe Population III and II star formation?

Hidenobu Yajima, Sadegh Khochfar (University of Edinburgh)

arxiv:1405.7385 v2 · 2014-05-28 · 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{4HKW2UJXUPPEC2HAYQOJZRI5FY}

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	2026-05-18T01:43:05.202549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1d56d5137a3de4168e0c41c9cc51d2e3e84a150212af9b0f10ea7983bf801d8

Aliases

arxiv: 1405.7385 · arxiv_version: 1405.7385v2 · doi: 10.48550/arxiv.1405.7385 · pith_short_12: 4HKW2UJXUPPE · pith_short_16: 4HKW2UJXUPPEC2HA · pith_short_8: 4HKW2UJX

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/4HKW2UJXUPPEC2HAYQOJZRI5FY \
  | 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: e1d56d5137a3de4168e0c41c9cc51d2e3e84a150212af9b0f10ea7983bf801d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3785f3895f7b6c45e2f274c8340a4c4e1141bb70995ed2dfeed3a4629699a537",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-05-28T20:06:50Z",
    "title_canon_sha256": "42c8706cb603efdb8407227602136172340cea41989d4d2db2513210c0591b67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.7385",
    "kind": "arxiv",
    "version": 2
  }
}