Pith Number

pith:Z3G5L3JF

pith:2015:Z3G5L3JF4ZUKZ3WCPRBLJDZWSJ

not attested not anchored not stored refs pending

NP-hardness of sortedness constraints

Irena Rusu

arxiv:1506.02442 v1 · 2015-06-08 · cs.CC · cs.AI · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z3G5L3JF4ZUKZ3WCPRBLJDZWSJ}

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	2026-05-18T01:55:51.085146Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cecdd5ed25e668aceec27c42b48f369278355ab6808a1894130980d2e92fb33f

Aliases

arxiv: 1506.02442 · arxiv_version: 1506.02442v1 · doi: 10.48550/arxiv.1506.02442 · pith_short_12: Z3G5L3JF4ZUK · pith_short_16: Z3G5L3JF4ZUKZ3WC · pith_short_8: Z3G5L3JF

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/Z3G5L3JF4ZUKZ3WCPRBLJDZWSJ \
  | 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: cecdd5ed25e668aceec27c42b48f369278355ab6808a1894130980d2e92fb33f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce33f04f05d3b320f1c095154666980dce64bdcbedf1f584ca44c572289a091a",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-06-08T11:24:06Z",
    "title_canon_sha256": "5832997649993753d7275c06c3ae4d1754394134423f5e00bc24827b95fb2a02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.02442",
    "kind": "arxiv",
    "version": 1
  }
}