Pith Number

pith:HF6IBUAT

pith:2009:HF6IBUAT6CPHWLO77P5KYU3GWR

not attested not anchored not stored refs pending

Metal production in M33: space and time variations

(2) NOAO, (3) Universidad Autonoma Madrid), Daniele Galli (1), Edvige Corbelli (1), Eva Villaver (3) ((1) INAF, Laura Magrini (1), Letizia Stanghellini (2), Osservatorio Astrofisico di Arcetri, Tuscon

arxiv:0912.2616 v2 · 2009-12-14 · 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{HF6IBUAT6CPHWLO77P5KYU3GWR}

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	2026-05-18T02:10:23.944668Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

397c80d013f09e7b2ddffbfaac5366b44073f94047dd1d076f5bea93ea73e3d1

Aliases

arxiv: 0912.2616 · arxiv_version: 0912.2616v2 · doi: 10.48550/arxiv.0912.2616 · pith_short_12: HF6IBUAT6CPH · pith_short_16: HF6IBUAT6CPHWLO7 · pith_short_8: HF6IBUAT

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/HF6IBUAT6CPHWLO77P5KYU3GWR \
  | 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: 397c80d013f09e7b2ddffbfaac5366b44073f94047dd1d076f5bea93ea73e3d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eda2dfa96cb5f37acd972065cf4d44e611fb9edfc7d6a752ee410f3b3e010194",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-14T11:17:38Z",
    "title_canon_sha256": "d8a7254dea86c31c2a8df670515337832b702d418b9f7faa6649ef71e98fa2fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2616",
    "kind": "arxiv",
    "version": 2
  }
}