Pith Number

pith:2NI3Q7SA

pith:2010:2NI3Q7SAW6VALQGP44SLO5WTUT

not attested not anchored not stored refs pending

The mass assembly of galaxy groups and the evolution of the magnitude gap

Ali A. Dariush, Andrew J. Benson, Frazer Pearce, Habib G. Khosroshahi, Richard G. Bower, Somak Raychaudhury, Trevor J. Ponman

arxiv:1002.4414 v1 · 2010-02-23 · 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	2026-05-18T02:08:57.634865Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d351b87e40b7aa05c0cfe724b776d3a4f75a0f4a4d483c45711ca427ca0c21e6

Aliases

arxiv: 1002.4414 · arxiv_version: 1002.4414v1 · doi: 10.48550/arxiv.1002.4414 · pith_short_12: 2NI3Q7SAW6VA · pith_short_16: 2NI3Q7SAW6VALQGP · pith_short_8: 2NI3Q7SA

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/2NI3Q7SAW6VALQGP44SLO5WTUT \
  | 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: d351b87e40b7aa05c0cfe724b776d3a4f75a0f4a4d483c45711ca427ca0c21e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31d6410846dbd458a900cbe3855197acd4bc17004c6fe7a459e174bd192f7eaf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-02-23T21:05:33Z",
    "title_canon_sha256": "64528fc1c2f0af45bc6f5751a271a33126b87a9f431672f818d891a29fb66b5f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4414",
    "kind": "arxiv",
    "version": 1
  }
}