Pith Number

pith:67JLWDUG

pith:2008:67JLWDUGQZRP35M2T47QODKPX2

not attested not anchored not stored refs pending

Observing the First Stars and Black Holes

Zoltan Haiman (Columbia University)

arxiv:0809.3926 v1 · 2008-09-23 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{67JLWDUGQZRP35M2T47QODKPX2}

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	2026-05-18T02:15:33.980346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f7d2bb0e868662fdf59a9f3f070d4fbea384b580591bcf2e8548a80afdca931c

Aliases

arxiv: 0809.3926 · arxiv_version: 0809.3926v1 · doi: 10.48550/arxiv.0809.3926 · pith_short_12: 67JLWDUGQZRP · pith_short_16: 67JLWDUGQZRP35M2 · pith_short_8: 67JLWDUG

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/67JLWDUGQZRP35M2T47QODKPX2 \
  | 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: f7d2bb0e868662fdf59a9f3f070d4fbea384b580591bcf2e8548a80afdca931c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d8ea6a884ccccc12923b670ce1d5912dcf1d2ce03f3d978e60a97772c3dccf4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-09-23T14:18:09Z",
    "title_canon_sha256": "5bd9c31e785431b1d35d2e428344e86b411f87ea9bd6d02b4de922ef59cf0213"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3926",
    "kind": "arxiv",
    "version": 1
  }
}