Pith Number

pith:WDB4LHBV

pith:2009:WDB4LHBVOQC6E5BTBSCT5ZXVCV

not attested not anchored not stored refs pending

On the Origin of the Galaxy Star-Formation-Rate Sequence: Evolution and Scatter

Aaron A. Dutton, Avishai Dekel, Frank C. van den Bosch

arxiv:0912.2169 v2 · 2009-12-11 · 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.

Receipt and verification

First computed	2026-05-18T02:10:24.607778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b0c3c59c357405e274330c853ee6f515560d2da8e6a724517facf4ef454b5fcd

Aliases

arxiv: 0912.2169 · arxiv_version: 0912.2169v2 · doi: 10.48550/arxiv.0912.2169 · pith_short_12: WDB4LHBVOQC6 · pith_short_16: WDB4LHBVOQC6E5BT · pith_short_8: WDB4LHBV

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/WDB4LHBVOQC6E5BTBSCT5ZXVCV \
  | 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: b0c3c59c357405e274330c853ee6f515560d2da8e6a724517facf4ef454b5fcd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ded261d7a91465cdaf8f6c10e4c9c9c024b8752237a3e27284672adc39a7a2cc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-11T07:43:48Z",
    "title_canon_sha256": "6757d18ea871f4640fb8adbd0c23e4d8449315d3b06d100e9f7d66c4a4453790"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2169",
    "kind": "arxiv",
    "version": 2
  }
}