Pith Number

pith:7FBDTV4L

pith:2026:7FBDTV4LCL3VIXNRAK7GHTSQCD

not attested not anchored not stored refs pending

Elemental Stoichiometry as an Ecological Biosignature with Applications to Life Detection

Christopher P. Kempes, Cole Mathis, Elizabeth Trembath-Reichert, Hilairy E. Hartnett, John F. Malloy, L. Felipe Benites, Pilar C. Vergeli, Sara I. Walker

arxiv:2605.19252 v1 · 2026-05-19 · q-bio.BM · astro-ph.EP · q-bio.MN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7FBDTV4LCL3VIXNRAK7GHTSQCD}

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	2026-05-20T01:05:36.109797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f94239d78b12f7545db102be63ce5010caeb29044d1cf271c78273cfd6c7e384

Aliases

arxiv: 2605.19252 · arxiv_version: 2605.19252v1 · doi: 10.48550/arxiv.2605.19252 · pith_short_12: 7FBDTV4LCL3V · pith_short_16: 7FBDTV4LCL3VIXNR · pith_short_8: 7FBDTV4L

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/7FBDTV4LCL3VIXNRAK7GHTSQCD \
  | 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: f94239d78b12f7545db102be63ce5010caeb29044d1cf271c78273cfd6c7e384

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b7c726a148c02bc9b8012a8e9630c2cf5e0a54acf4ffe3f123f9e07816727dc",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "q-bio.MN"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2026-05-19T01:49:35Z",
    "title_canon_sha256": "2072965befc97bfb45c36f125e6c10a5681ba2b2ea4b54837f604ac52acfc4c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.19252",
    "kind": "arxiv",
    "version": 1
  }
}