Pith Number

pith:Q4S32TZP

pith:2012:Q4S32TZPMMFZ3XWQ3JXLRBYNCD

not attested not anchored not stored refs pending

Origin of the Cosmic Ray Spectral Hardening

N. Tomassetti

arxiv:1204.4492 v2 · 2012-04-19 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q4S32TZPMMFZ3XWQ3JXLRBYNCD}

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	2026-05-18T03:54:48.942549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8725bd4f2f630b9dded0da6eb8870d10ec987fa3a36705cf4f3e449ccdeb3b81

Aliases

arxiv: 1204.4492 · arxiv_version: 1204.4492v2 · doi: 10.48550/arxiv.1204.4492 · pith_short_12: Q4S32TZPMMFZ · pith_short_16: Q4S32TZPMMFZ3XWQ · pith_short_8: Q4S32TZP

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/Q4S32TZPMMFZ3XWQ3JXLRBYNCD \
  | 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: 8725bd4f2f630b9dded0da6eb8870d10ec987fa3a36705cf4f3e449ccdeb3b81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95d2d43c4d14a267ed78e6f1367d28fa08e7c1576214a1700a96c482d98013d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2012-04-19T22:58:43Z",
    "title_canon_sha256": "9116336878e7d2f341801b89d997fc7b02d883525685d0340204a01ff746607b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4492",
    "kind": "arxiv",
    "version": 2
  }
}