Pith Number

pith:QEIE2NG7

pith:2025:QEIE2NG7AY45NRAMCVAWGUK4QO

not attested not anchored not stored refs pending

Stellar populations of quasar host galaxies with MFICA decomposition

Carolin Villforth, Paul C. Hewett, Sahyadri Devidatt Krishna, Vivienne Wild

arxiv:2509.10271 v1 · 2025-09-12 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QEIE2NG7AY45NRAMCVAWGUK4QO}

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	2026-07-05T12:11:06.046010Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81104d34df0639d6c40c154163515c839b48c509c462aa0178d1ea792c1b2585

Aliases

arxiv: 2509.10271 · arxiv_version: 2509.10271v1 · doi: 10.48550/arxiv.2509.10271 · pith_short_12: QEIE2NG7AY45 · pith_short_16: QEIE2NG7AY45NRAM · pith_short_8: QEIE2NG7

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/QEIE2NG7AY45NRAMCVAWGUK4QO \
  | 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: 81104d34df0639d6c40c154163515c839b48c509c462aa0178d1ea792c1b2585

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c23de334dfd68a81ebebc28f942854f72915dfc20b9b0719a42c2f826298795c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2025-09-12T14:11:22Z",
    "title_canon_sha256": "45f62cff3b57274b4a7474c18337bc67f12835ccf0874e193478e5c240bc5f7b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.10271",
    "kind": "arxiv",
    "version": 1
  }
}