Pith Number

pith:SZRW76VB

pith:2009:SZRW76VBEXQJWUCOEQBGHBOXGF

not attested not anchored not stored refs pending

Evolution and the second law of thermodynamics

Emory F. Bunn

arxiv:0903.4603 v1 · 2009-03-26 · physics.pop-ph · q-bio.PE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SZRW76VBEXQJWUCOEQBGHBOXGF}

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	2026-05-18T02:14:19.348123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96636ffaa125e09b504e24026385d7316f47fb46cd18a70e01dd94e0a6dfb871

Aliases

arxiv: 0903.4603 · arxiv_version: 0903.4603v1 · doi: 10.48550/arxiv.0903.4603 · pith_short_12: SZRW76VBEXQJ · pith_short_16: SZRW76VBEXQJWUCO · pith_short_8: SZRW76VB

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/SZRW76VBEXQJWUCOEQBGHBOXGF \
  | 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: 96636ffaa125e09b504e24026385d7316f47fb46cd18a70e01dd94e0a6dfb871

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a795345b16f13ce045399c9c33d7231f07d033c7887c0c0dc36bdbd1827f5bbd",
    "cross_cats_sorted": [
      "q-bio.PE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2009-03-26T14:58:49Z",
    "title_canon_sha256": "15cf6dd04bac9a3e1eebfa87bf1e43f43583e263fc631bb73054680f002ff244"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.4603",
    "kind": "arxiv",
    "version": 1
  }
}