Pith Number

pith:PPDZOUZY

pith:2009:PPDZOUZYQASDSHKL4O44QE6WGD

not attested not anchored not stored refs pending

Dark Stars: a new look at the First Stars in the Universe

Douglas Spolyar, Katherine Freese, Palo Gondolo, Peter Bodenheimer

arxiv:0903.3070 v1 · 2009-03-18 · astro-ph.CO

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

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.

Cited by

1 paper in Pith

Direct Collapse Black Hole Candidates from Decaying Dark Matter

Receipt and verification

First computed	2026-05-18T04:29:15.847344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bc79753388024391d4be3b9c813d630e69d6af434257361a87ad585f5a8107f

Aliases

arxiv: 0903.3070 · arxiv_version: 0903.3070v1 · doi: 10.48550/arxiv.0903.3070 · pith_short_12: PPDZOUZYQASD · pith_short_16: PPDZOUZYQASDSHKL · pith_short_8: PPDZOUZY

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/PPDZOUZYQASDSHKL4O44QE6WGD \
  | 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: 7bc79753388024391d4be3b9c813d630e69d6af434257361a87ad585f5a8107f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "005a3e07f7c87d65ac03889ada5cf2d3ed9d5d9d88f42a0e59a8c363fe724241",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-03-18T17:42:47Z",
    "title_canon_sha256": "ae4ebbdb5cf44587ddcf95c28e85222272b006dc9a3f2e36f0ea89cd147002ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.3070",
    "kind": "arxiv",
    "version": 1
  }
}