Pith Number

pith:PSOFFUTP

pith:2016:PSOFFUTP6KFR5XOI5WHBQMLBYE

not attested not anchored not stored refs pending

Hardness of approximation for H-free edge modification problems

Ivan Bliznets, Marek Cygan, Michal Pilipczuk, Pawel Komosa

arxiv:1606.02688 v2 · 2016-06-08 · cs.DS

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

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	2026-05-18T00:16:09.660180Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7c9c52d26ff28b1eddc8ed8e183161c1281a3ae95d1f0ca525aa826507933429

Aliases

arxiv: 1606.02688 · arxiv_version: 1606.02688v2 · doi: 10.48550/arxiv.1606.02688 · pith_short_12: PSOFFUTP6KFR · pith_short_16: PSOFFUTP6KFR5XOI · pith_short_8: PSOFFUTP

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/PSOFFUTP6KFR5XOI5WHBQMLBYE \
  | 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: 7c9c52d26ff28b1eddc8ed8e183161c1281a3ae95d1f0ca525aa826507933429

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9742f2fd7062754769e2e132aeeffd3c3a2e666c4ea573209b80b17f0489f9b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2016-06-08T19:01:02Z",
    "title_canon_sha256": "47e56b9d05f9130008f9fa4052f1efb6616331df77bca813ba6c5c5952e490a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.02688",
    "kind": "arxiv",
    "version": 2
  }
}