Pith Number

pith:TUTJC5VM

pith:2014:TUTJC5VMSWFPEBRUSYE7MKSCYR

not attested not anchored not stored refs pending

Minimal TSP Tour is coNP-Complete

Marzio De Biasi

arxiv:1403.3431 v2 · 2014-03-13 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TUTJC5VMSWFPEBRUSYE7MKSCYR}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T02:55:56.878763Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d269176ac958af206349609f62a42c4603a3068e63eb1779ea76dc2dde15547

Aliases

arxiv: 1403.3431 · arxiv_version: 1403.3431v2 · doi: 10.48550/arxiv.1403.3431 · pith_short_12: TUTJC5VMSWFP · pith_short_16: TUTJC5VMSWFPEBRU · pith_short_8: TUTJC5VM

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/TUTJC5VMSWFPEBRUSYE7MKSCYR \
  | 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: 9d269176ac958af206349609f62a42c4603a3068e63eb1779ea76dc2dde15547

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ace64fed5558c355d03d751b30506a5854b12026b889f9dd0d6e25db8b180d7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-03-13T21:00:36Z",
    "title_canon_sha256": "0250107307774a7c5e25fc044c64045b536bd9dc7aa46b476de7823906a12c44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.3431",
    "kind": "arxiv",
    "version": 2
  }
}