Pith Number

pith:42UM35VD

pith:2018:42UM35VDHTA2LXLWSHOUYWYKSO

not attested not anchored not stored refs pending

Gaian bottlenecks and planetary habitability maintained by evolving model biospheres: The ExoGaia model

Arwen E. Nicholson, David M. Wilkinson, Hywel T. P. Williams, Timothy M. Lenton

arxiv:1803.08063 v2 · 2018-03-21 · 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{42UM35VDHTA2LXLWSHOUYWYKSO}

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	2026-05-18T00:20:01.320094Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e6a8cdf6a33cc1a5dd7691dd4c5b0a93a3658ab4837dec43ea968e5a5ce8dfee

Aliases

arxiv: 1803.08063 · arxiv_version: 1803.08063v2 · doi: 10.48550/arxiv.1803.08063 · pith_short_12: 42UM35VDHTA2 · pith_short_16: 42UM35VDHTA2LXLW · pith_short_8: 42UM35VD

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/42UM35VDHTA2LXLWSHOUYWYKSO \
  | 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: e6a8cdf6a33cc1a5dd7691dd4c5b0a93a3658ab4837dec43ea968e5a5ce8dfee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e9c8f31753880f12e30cae0bed5dedddae8833ac74f7d5d8587037cb995871c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2018-03-21T18:00:38Z",
    "title_canon_sha256": "28365d55ee4c050f5d291d86d187f62a2ac01a2c22bf486da1c10f7c39ba411a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.08063",
    "kind": "arxiv",
    "version": 2
  }
}