Pith Number

pith:NU2MGUPT

pith:2017:NU2MGUPT7HZXDHBKXUAFB2U2B5

not attested not anchored not stored refs pending

Perfect Edge Domination: Hard and Solvable Cases

Jayme L. Szwarcfiter, Min Chih Lin, Vadim Lozin, Veronica A. Moyano

arxiv:1705.08379 v1 · 2017-05-23 · 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{NU2MGUPT7HZXDHBKXUAFB2U2B5}

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	2026-05-18T00:43:48.429507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d34c351f3f9f3719c2abd0050ea9a0f4016cb496f47446c6393fb410b643811

Aliases

arxiv: 1705.08379 · arxiv_version: 1705.08379v1 · doi: 10.48550/arxiv.1705.08379 · pith_short_12: NU2MGUPT7HZX · pith_short_16: NU2MGUPT7HZXDHBK · pith_short_8: NU2MGUPT

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/NU2MGUPT7HZXDHBKXUAFB2U2B5 \
  | 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: 6d34c351f3f9f3719c2abd0050ea9a0f4016cb496f47446c6393fb410b643811

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14927fa9579b3193f37ad0c6bd32705d2eda6f45a513fe455d1514b9b2dfce11",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2017-05-23T15:53:04Z",
    "title_canon_sha256": "1de6da0fcf8d81421ceb7bdb14d2bf9f3965f50b2c40829dbc13871598a336a9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.08379",
    "kind": "arxiv",
    "version": 1
  }
}