Pith Number

pith:5GL3XRHA

pith:2015:5GL3XRHA6E3CS62R7N37C2J4CS

not attested not anchored not stored refs pending

Simple greedy 2-approximation algorithm for the maximum genus of a graph

Martin Skoviera, Michal Kotrbcik

arxiv:1501.07460 v1 · 2015-01-29 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5GL3XRHA6E3CS62R7N37C2J4CS}

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	2026-05-18T02:28:21.881947Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e997bbc4e0f136297b51fb77f1693c149045f3aa3085252d8d1f0b58301fecf6

Aliases

arxiv: 1501.07460 · arxiv_version: 1501.07460v1 · doi: 10.48550/arxiv.1501.07460 · pith_short_12: 5GL3XRHA6E3C · pith_short_16: 5GL3XRHA6E3CS62R · pith_short_8: 5GL3XRHA

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/5GL3XRHA6E3CS62R7N37C2J4CS \
  | 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: e997bbc4e0f136297b51fb77f1693c149045f3aa3085252d8d1f0b58301fecf6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8f5822a580e3add4dbe659b097811b76485aa82a96758c96dc3b263b2b2d18c",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-01-29T14:37:12Z",
    "title_canon_sha256": "92ba95c181cd9d83bf311d3b60a6ef3dce6f9afa23f3f876d1622ffa955966d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.07460",
    "kind": "arxiv",
    "version": 1
  }
}