Pith Number

pith:FG6QODUX

pith:2010:FG6QODUXCVU6QRZ3ONAG6O4EXE

not attested not anchored not stored refs pending

Dark Matter Contraction and the Stellar Content of Massive Early-type Galaxies: Disfavoring "Light" Initial Mass Functions

(2) IAP, (3) Utah, (4) Kapteyn, (5) SLAC), A. S. Bolton (3), L. V. E. Koopmans (4), M. W. Auger (1), P. J. Marshall (5) ((1) UCSB, R. Gavazzi (2), T. Treu (1)

arxiv:1007.2409 v1 · 2010-07-14 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FG6QODUXCVU6QRZ3ONAG6O4EXE}

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

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	2026-05-18T02:06:21.947608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29bd070e971569e8473b73406f3b84b92f846e45ea9b90453021ab0479aaf286

Aliases

arxiv: 1007.2409 · arxiv_version: 1007.2409v1 · doi: 10.48550/arxiv.1007.2409 · pith_short_12: FG6QODUXCVU6 · pith_short_16: FG6QODUXCVU6QRZ3 · pith_short_8: FG6QODUX

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/FG6QODUXCVU6QRZ3ONAG6O4EXE \
  | 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: 29bd070e971569e8473b73406f3b84b92f846e45ea9b90453021ab0479aaf286

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "832c2ca46cf54e70c89d4117ba896eedad38871c4b4334efa40887a64e5d9776",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-07-14T20:00:01Z",
    "title_canon_sha256": "43c83dca823c3bb9d3d583a3ebe27826a1e13536cb9dc454c11b04d57b7af8d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.2409",
    "kind": "arxiv",
    "version": 1
  }
}