Pith Number

pith:PM2ETUWQ

pith:2012:PM2ETUWQ6ZIKKOKYVJMV2OLONN

not attested not anchored not stored refs pending

On the Easiest and Hardest Fitness Functions

Jun He, Tianshi Chen, Xin Yao

arxiv:1203.6286 v5 · 2012-03-28 · cs.NE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PM2ETUWQ6ZIKKOKYVJMV2OLONN}

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	2026-05-18T00:17:13.843914Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b3449d2d0f650a53958aa595d396e6b645ed53ed9f0fbcf468d879e559ed3da

Aliases

arxiv: 1203.6286 · arxiv_version: 1203.6286v5 · doi: 10.48550/arxiv.1203.6286 · pith_short_12: PM2ETUWQ6ZIK · pith_short_16: PM2ETUWQ6ZIKKOKY · pith_short_8: PM2ETUWQ

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/PM2ETUWQ6ZIKKOKYVJMV2OLONN \
  | 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: 7b3449d2d0f650a53958aa595d396e6b645ed53ed9f0fbcf468d879e559ed3da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5d22e7b5471b452d67857892a5349a87b1da1b73f9a54d9085e36ac68e8360b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2012-03-28T15:01:53Z",
    "title_canon_sha256": "87fae1465a5e49aed893526cdae1c3b760aeba0b2584503608e456ae41f03756"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.6286",
    "kind": "arxiv",
    "version": 5
  }
}