Pith Number

pith:BDHTR7MG

pith:2018:BDHTR7MGPDGYRH5RNTM4U2VJ3R

not attested not anchored not stored refs pending

On the weighted safe set problem on paths and cycles

Boram Park, Shinya Fujita, Tadashi Sakuma, Tommy Jensen

arxiv:1802.03579 v2 · 2018-02-10 · 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{BDHTR7MGPDGYRH5RNTM4U2VJ3R}

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	2026-05-18T00:14:40.360552Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08cf38fd8678cd889fb16cd9ca6aa9dc4e759b9fc2cc16b5c1e9e6bce1a9405f

Aliases

arxiv: 1802.03579 · arxiv_version: 1802.03579v2 · doi: 10.48550/arxiv.1802.03579 · pith_short_12: BDHTR7MGPDGY · pith_short_16: BDHTR7MGPDGYRH5R · pith_short_8: BDHTR7MG

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/BDHTR7MGPDGYRH5RNTM4U2VJ3R \
  | 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: 08cf38fd8678cd889fb16cd9ca6aa9dc4e759b9fc2cc16b5c1e9e6bce1a9405f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fd848dcc28579feed225d9aca89777f5baf37c1e790b5a6a0c5034ebee5bae4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-02-10T12:48:48Z",
    "title_canon_sha256": "caa2f4fe6fba027d5a9020ae7a4652008678a6252c4c0ea56ae0e95d043163a2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03579",
    "kind": "arxiv",
    "version": 2
  }
}