Pith Number

pith:SU3SL2IN

pith:2013:SU3SL2INTRK6OIV7BCLQJGEAPO

not attested not anchored not stored refs pending

An Adaptive Threshold in Mammalian Neocortical Evolution

Alex T. Kalinka, Eric Lewitus, Iva Kelava, Pavel Tomancak, Wieland B Huttner

arxiv:1304.5412 v2 · 2013-04-19 · q-bio.PE · q-bio.NC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SU3SL2INTRK6OIV7BCLQJGEAPO}

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	2026-05-18T01:34:51.266755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

953725e90d9c55e722bf08970498807bbead0c77ccfc972b428124c15d8e33a1

Aliases

arxiv: 1304.5412 · arxiv_version: 1304.5412v2 · doi: 10.48550/arxiv.1304.5412 · pith_short_12: SU3SL2INTRK6 · pith_short_16: SU3SL2INTRK6OIV7 · pith_short_8: SU3SL2IN

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/SU3SL2INTRK6OIV7BCLQJGEAPO \
  | 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: 953725e90d9c55e722bf08970498807bbead0c77ccfc972b428124c15d8e33a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51ec8627ed8898d03f1d764432785c318d355fe17222f8e5d9ceff8551a93564",
    "cross_cats_sorted": [
      "q-bio.NC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.PE",
    "submitted_at": "2013-04-19T13:28:06Z",
    "title_canon_sha256": "c19cc065d59f17fb65f6f9386a98e67e72c29c3fe58d2d31fc53bbaf40df31b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.5412",
    "kind": "arxiv",
    "version": 2
  }
}