Pith Number

pith:C4A7FU2S

pith:2019:C4A7FU2SIV3MLIQDHD7PAU3JOS

not attested not anchored not stored refs pending

Reducing Path TSP to TSP

Jens Vygen, Rico Zenklusen, Vera Traub

arxiv:1907.10376 v1 · 2019-07-24 · cs.DM · cs.DS · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C4A7FU2SIV3MLIQDHD7PAU3JOS}

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	2026-05-17T23:39:38.121010Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1701f2d3524576c5a20338fef0536974b3c244accad8ac3bb7c7ce2b8c9c9b0c

Aliases

arxiv: 1907.10376 · arxiv_version: 1907.10376v1 · doi: 10.48550/arxiv.1907.10376 · pith_short_12: C4A7FU2SIV3M · pith_short_16: C4A7FU2SIV3MLIQD · pith_short_8: C4A7FU2S

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/C4A7FU2SIV3MLIQDHD7PAU3JOS \
  | 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: 1701f2d3524576c5a20338fef0536974b3c244accad8ac3bb7c7ce2b8c9c9b0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "62bbd6f57d08b2f637a49ecb7c4e70ba4ad270f22de11f0f6534857d8cee1601",
    "cross_cats_sorted": [
      "cs.DS",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2019-07-24T12:03:10Z",
    "title_canon_sha256": "0e6a5038ee7948a60a7fefbbf978c9dd02c10fde3a2115e492b86492e734d3c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.10376",
    "kind": "arxiv",
    "version": 1
  }
}