Pith Number

pith:IH7GAH3N

pith:2015:IH7GAH3N45D2TYUNUSOHIHIOUS

not attested not anchored not stored refs pending

Obtaining Quality-Proved Near Optimal Results for Traveling Salesman Problem

Chaojie Huang, Qin Xiong, Wenhong Tian, Xinyang Wang

arxiv:1502.00447 v2 · 2015-02-02 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IH7GAH3N45D2TYUNUSOHIHIOUS}

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	2026-05-18T00:55:25.813342Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41fe601f6de747a9e28da49c741d0ea491f6914ba59cbad1b8e37f0ebe7ab0ef

Aliases

arxiv: 1502.00447 · arxiv_version: 1502.00447v2 · doi: 10.48550/arxiv.1502.00447 · pith_short_12: IH7GAH3N45D2 · pith_short_16: IH7GAH3N45D2TYUN · pith_short_8: IH7GAH3N

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/IH7GAH3N45D2TYUNUSOHIHIOUS \
  | 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: 41fe601f6de747a9e28da49c741d0ea491f6914ba59cbad1b8e37f0ebe7ab0ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "950852534c3d818a1f7a7012290e8f67d523d4b011dd873b5072532a2f39df2d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2015-02-02T12:07:37Z",
    "title_canon_sha256": "4d1fa3d5f388d9438b491fe323328d23cf1ccf7f9dd96cf1efc5f927f0996824"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00447",
    "kind": "arxiv",
    "version": 2
  }
}