Pith Number

pith:4UFAVBOV

pith:2012:4UFAVBOVK7UFXGF3PW3Z7E7FCL

not attested not anchored not stored refs pending

How to Attack the NP-complete Dag Realization Problem in Practice

Annabell Berger, Matthias M\"uller-Hannemann

arxiv:1203.3636 v1 · 2012-03-16 · cs.DS · 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{4UFAVBOVK7UFXGF3PW3Z7E7FCL}

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	2026-05-18T03:59:50.367726Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e50a0a85d557e85b98bb7db79f93e512e3e0bf3470c41354325eba45795bc5bc

Aliases

arxiv: 1203.3636 · arxiv_version: 1203.3636v1 · doi: 10.48550/arxiv.1203.3636 · pith_short_12: 4UFAVBOVK7UF · pith_short_16: 4UFAVBOVK7UFXGF3 · pith_short_8: 4UFAVBOV

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/4UFAVBOVK7UFXGF3PW3Z7E7FCL \
  | 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: e50a0a85d557e85b98bb7db79f93e512e3e0bf3470c41354325eba45795bc5bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2aee6e1b500e8b9de8311c498597b85323efaad04f6e1d32a4754d52ba97851f",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-03-16T08:42:58Z",
    "title_canon_sha256": "1d1ce57dfb4d7c3d3292aec98755412201140cdc236c968b29dcc4096cff8f65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.3636",
    "kind": "arxiv",
    "version": 1
  }
}