Pith Number

pith:K3IST7KL

pith:2003:K3IST7KLDVYB7G4ATHF2XWDTIV

not attested not anchored not stored refs pending

The First Sources of Light

Abraham Loeb, Volker Bromm

arxiv:astro-ph/0301406 v2 · 2003-01-21 · 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{K3IST7KLDVYB7G4ATHF2XWDTIV}

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	2026-07-04T16:36:21.304955Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

56d129fd4b1d701f9b8099cbabd8734552999e5fcd3e5a40832c167f5ae97ca2

Aliases

arxiv: astro-ph/0301406 · arxiv_version: astro-ph/0301406v2 · doi: 10.48550/arxiv.astro-ph/0301406 · pith_short_12: K3IST7KLDVYB · pith_short_16: K3IST7KLDVYB7G4A · pith_short_8: K3IST7KL

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/K3IST7KLDVYB7G4ATHF2XWDTIV \
  | 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: 56d129fd4b1d701f9b8099cbabd8734552999e5fcd3e5a40832c167f5ae97ca2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34c0ca9e42a0cdd05712d0a979d27b7b010a99942fedb5d76e1c61425570f0ed",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-01-21T10:49:01Z",
    "title_canon_sha256": "32d4a8643bf2f68e15ee5afb51123706e62e6c3cd594cdf2ea273f2edb417163"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0301406",
    "kind": "arxiv",
    "version": 2
  }
}