Pith Number

pith:IX77M3QP

pith:2009:IX77M3QPNIGPRTLRVY4X3TM65N

not attested not anchored not stored refs pending

Red star-forming and blue passive galaxies in clusters

Smriti Mahajan, Somak Raychaudhury

arxiv:0908.2434 v1 · 2009-08-17 · 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	2026-05-18T02:12:25.888441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45fff66e0f6a0cf8cd71ae397dcd9eeb5852de8983daffb6d0da866eda38d057

Aliases

arxiv: 0908.2434 · arxiv_version: 0908.2434v1 · doi: 10.48550/arxiv.0908.2434 · pith_short_12: IX77M3QPNIGP · pith_short_16: IX77M3QPNIGPRTLR · pith_short_8: IX77M3QP

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/IX77M3QPNIGPRTLRVY4X3TM65N \
  | 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: 45fff66e0f6a0cf8cd71ae397dcd9eeb5852de8983daffb6d0da866eda38d057

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "978f864237a4cc25a2728442aa182ca0558dec413b6bdb939cbf09cb1bc6a936",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-17T20:28:12Z",
    "title_canon_sha256": "6f5e00d45e819d44f61bd416aaf7d06329e31e6944150eee03fb3aa8f55495fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2434",
    "kind": "arxiv",
    "version": 1
  }
}