Pith Number

pith:J4ASZ3ZK

pith:2017:J4ASZ3ZKMP3NHIB5KIB326QKFK

not attested not anchored not stored refs pending

Improving TSP tours using dynamic programming over tree decomposition

Arkadiusz Socala, Lukasz Kowalik, Marek Cygan

arxiv:1703.05559 v2 · 2017-03-16 · 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	2026-05-18T00:39:06.714792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f012cef2a63f6d3a03d5203bd7a0a2a82dd75928796b051e0948b579661e7db

Aliases

arxiv: 1703.05559 · arxiv_version: 1703.05559v2 · doi: 10.48550/arxiv.1703.05559 · pith_short_12: J4ASZ3ZKMP3N · pith_short_16: J4ASZ3ZKMP3NHIB5 · pith_short_8: J4ASZ3ZK

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/J4ASZ3ZKMP3NHIB5KIB326QKFK \
  | 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: 4f012cef2a63f6d3a03d5203bd7a0a2a82dd75928796b051e0948b579661e7db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb0989038bb185c81a1691631db5148dbf7c4439073d04e0c9a270abaac35ae3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-03-16T11:09:25Z",
    "title_canon_sha256": "4af6ae193a8b8cd34bee6b02a58e0d62c8d3e84dcaaa5136772227fe65a37fc1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.05559",
    "kind": "arxiv",
    "version": 2
  }
}