Pith Number

pith:MDQ7MPIT

pith:2011:MDQ7MPITSENHLOG7DO5H6D3GXJ

not attested not anchored not stored refs pending

On the stellar and baryonic mass fractions of central blue and red galaxies

2), (2) INAF-OAB, A. Rodriguez-Puebla (1), C. Firmani (1, CRyA-UNAM), P. Colin (3) ((1) IA-UNAM, V. Avila-Reese (1)

arxiv:1103.4151 v3 · 2011-03-21 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MDQ7MPITSENHLOG7DO5H6D3GXJ}

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	2026-05-18T03:15:44.117579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60e1f63d13911a75b8df1bba7f0f66ba5e4b4fd5c7dd9f5016c7a1d1959cd199

Aliases

arxiv: 1103.4151 · arxiv_version: 1103.4151v3 · doi: 10.48550/arxiv.1103.4151 · pith_short_12: MDQ7MPITSENH · pith_short_16: MDQ7MPITSENHLOG7 · pith_short_8: MDQ7MPIT

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/MDQ7MPITSENHLOG7DO5H6D3GXJ \
  | 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: 60e1f63d13911a75b8df1bba7f0f66ba5e4b4fd5c7dd9f5016c7a1d1959cd199

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59bb6129b84379208d344d2534f55cb8b01b10a2387d045fc7410621b70bf1b7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2011-03-21T21:00:01Z",
    "title_canon_sha256": "7fd4775ec83f522640bb1712b0ea602a19e48d6ec39d9638a7e9bf1dd3dd5f63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.4151",
    "kind": "arxiv",
    "version": 3
  }
}