Pith Number

pith:O42JF3UR

pith:2012:O42JF3URJVNSDYBUK4MR5ONXDV

not attested not anchored not stored refs pending

The energy costs of biological insulators

Eduardo D. Sontag, John Barton

arxiv:1210.3809 v2 · 2012-10-14 · q-bio.MN · q-bio.CB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O42JF3URJVNSDYBUK4MR5ONXDV}

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	2026-05-18T02:52:42.270778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

773492ee914d5b21e03457191eb9b71d7fffd549271428c9d35bef83032cd640

Aliases

arxiv: 1210.3809 · arxiv_version: 1210.3809v2 · doi: 10.48550/arxiv.1210.3809 · pith_short_12: O42JF3URJVNS · pith_short_16: O42JF3URJVNSDYBU · pith_short_8: O42JF3UR

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/O42JF3URJVNSDYBUK4MR5ONXDV \
  | 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: 773492ee914d5b21e03457191eb9b71d7fffd549271428c9d35bef83032cd640

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e796467c0ed30d9b792ddbb8101c1585e9561ce2a147c77d59b7e7c5eb73f1b",
    "cross_cats_sorted": [
      "q-bio.CB"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.MN",
    "submitted_at": "2012-10-14T16:23:33Z",
    "title_canon_sha256": "0e6df66ea456320da5767e1c9ce608bdb6db3600d43e02bef002deed459b4991"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.3809",
    "kind": "arxiv",
    "version": 2
  }
}