Pith Number

pith:P2YAAKZQ

pith:2008:P2YAAKZQLADLMYCXLUU7YVQ46Y

not attested not anchored not stored refs pending

Dark Matter Densities during the Formation of the First Stars and in Dark Stars

Douglas Spolyar, J. A. Sellwood, Katherine Freese, Paolo Gondolo

arxiv:0805.3540 v1 · 2008-05-22 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P2YAAKZQLADLMYCXLUU7YVQ46Y}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T04:29:33.565885Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7eb0002b305806b660575d29fc561cf63cd5ee4eb632109e89669d4b2a033f43

Aliases

arxiv: 0805.3540 · arxiv_version: 0805.3540v1 · doi: 10.48550/arxiv.0805.3540 · pith_short_12: P2YAAKZQLADL · pith_short_16: P2YAAKZQLADLMYCX · pith_short_8: P2YAAKZQ

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/P2YAAKZQLADLMYCXLUU7YVQ46Y \
  | 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: 7eb0002b305806b660575d29fc561cf63cd5ee4eb632109e89669d4b2a033f43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0eb9ccc0fbd7b4fd3f1ceaebec21faf36c79026d42fcfd693ef0135a31c770b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-05-22T21:10:45Z",
    "title_canon_sha256": "c012fba8f3499f0a83a28fcfa7fe60630811c97f02b2b37f641f34b94f1d7bf5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0805.3540",
    "kind": "arxiv",
    "version": 1
  }
}