Pith Number

pith:QQYZBTYP

pith:2009:QQYZBTYPIONZE4GLJ34W27XW77

not attested not anchored not stored refs pending

Metals, dust and the cosmic microwave background: fragmentation of high-redshift star-forming clouds

Kazuyuki Omukai, Raffaella Schneider

arxiv:0910.3665 v2 · 2009-10-19 · astro-ph.CO · astro-ph.SR

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QQYZBTYPIONZE4GLJ34W27XW77}

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	2026-05-18T02:11:14.115722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

843190cf0f439b9270cb4ef96d7ef6ffcd5b12ccf3b620950cdbfe69383fd3d2

Aliases

arxiv: 0910.3665 · arxiv_version: 0910.3665v2 · doi: 10.48550/arxiv.0910.3665 · pith_short_12: QQYZBTYPIONZ · pith_short_16: QQYZBTYPIONZE4GL · pith_short_8: QQYZBTYP

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/QQYZBTYPIONZE4GLJ34W27XW77 \
  | 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: 843190cf0f439b9270cb4ef96d7ef6ffcd5b12ccf3b620950cdbfe69383fd3d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "daffbf614af843eddf6af94c411377efcc66bb45be499d34c0de68ce56a16a1a",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-19T19:50:29Z",
    "title_canon_sha256": "ccc8aaead2e5ef39ff66060b2b891b070867c610289c3a4f9db9574786feabfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.3665",
    "kind": "arxiv",
    "version": 2
  }
}