Pith Number

pith:Q4WIEXTY

pith:2025:Q4WIEXTY5E7BGK73WLBTECZU7P

not attested not anchored not stored refs pending

Measurement of plutonium isotopes, 239Pu and 240Pu, in air-filter samples from Seville (2001-2002)

E. Chamizo, L. Wacker, M.C. Jim\'enez-Ramos, M. Garc\'ia-Le\'on, S.M. Enamorado

arxiv:2502.04334 v1 · 2025-01-23 · physics.ao-ph · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q4WIEXTY5E7BGK73WLBTECZU7P}

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	2026-07-05T10:10:49.887970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

872c825e78e93e132bfbb2c3320b34fbd16abf4174e94ccf06d959f79c50b474

Aliases

arxiv: 2502.04334 · arxiv_version: 2502.04334v1 · doi: 10.48550/arxiv.2502.04334 · pith_short_12: Q4WIEXTY5E7B · pith_short_16: Q4WIEXTY5E7BGK73 · pith_short_8: Q4WIEXTY

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/Q4WIEXTY5E7BGK73WLBTECZU7P \
  | 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: 872c825e78e93e132bfbb2c3320b34fbd16abf4174e94ccf06d959f79c50b474

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82ee95ab63f6ec77e95a8804aff845ae8f6e212723b3c7aa968b119b49340d88",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ao-ph",
    "submitted_at": "2025-01-23T16:40:39Z",
    "title_canon_sha256": "268aa0eb1551637b26a354118546c09d1c739bd7d7124fd2664ae7df2dcaeeae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.04334",
    "kind": "arxiv",
    "version": 1
  }
}