Pith Number

pith:H2DA55GM

pith:2008:H2DA55GMQPWOQFT6GHQEKZLOJP

not attested not anchored not stored refs pending

A 7/9 - Approximation Algorithm for the Maximum Traveling Salesman Problem

Aleksander Madry, Katarzyna Paluch, Marcin Mucha

arxiv:0812.5101 v1 · 2008-12-30 · cs.GT · cs.DM · 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{H2DA55GMQPWOQFT6GHQEKZLOJP}

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	2026-05-18T02:15:03.595422Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3e860ef4cc83ece8167e31e045656e4bdf235267c1421d92b0aa7c6087887e69

Aliases

arxiv: 0812.5101 · arxiv_version: 0812.5101v1 · doi: 10.48550/arxiv.0812.5101 · pith_short_12: H2DA55GMQPWO · pith_short_16: H2DA55GMQPWOQFT6 · pith_short_8: H2DA55GM

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/H2DA55GMQPWOQFT6GHQEKZLOJP \
  | 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: 3e860ef4cc83ece8167e31e045656e4bdf235267c1421d92b0aa7c6087887e69

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fc28fcac84ee3b4b82187006c07af975257b50a4ca70e6f28693ed3f97e482e",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GT",
    "submitted_at": "2008-12-30T19:11:48Z",
    "title_canon_sha256": "9ce9ccff05a4d185a7d964e21cb2bb72a18104ca3e92b4faefef837566eca266"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.5101",
    "kind": "arxiv",
    "version": 1
  }
}