Pith Number

pith:E7COSG4J

pith:2012:E7COSG4JCJE2GKUEAZ5NVYYAM3

not attested not anchored not stored refs pending

Lemmings is PSPACE-complete

Giovanni Viglietta

arxiv:1202.6581 v6 · 2012-02-29 · cs.GT · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E7COSG4JCJE2GKUEAZ5NVYYAM3}

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	2026-05-18T02:28:13.652332Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27c4e91b891249a32a84067adae30066ea97c21f8e2e65050ac1233de3a9d3fa

Aliases

arxiv: 1202.6581 · arxiv_version: 1202.6581v6 · doi: 10.48550/arxiv.1202.6581 · pith_short_12: E7COSG4JCJE2 · pith_short_16: E7COSG4JCJE2GKUE · pith_short_8: E7COSG4J

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/E7COSG4JCJE2GKUEAZ5NVYYAM3 \
  | 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: 27c4e91b891249a32a84067adae30066ea97c21f8e2e65050ac1233de3a9d3fa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "115227c1464bd0444e9e2e4a3246f9da8544b11d2c6901b05ab6526e782358dc",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GT",
    "submitted_at": "2012-02-29T15:55:22Z",
    "title_canon_sha256": "31b881e0a68562a05f3b47552ead4ce19ec7e02ca8c7a9b71af413e1115a0f57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.6581",
    "kind": "arxiv",
    "version": 6
  }
}