Pith Number

pith:FXHR5NL2

pith:2011:FXHR5NL2RBIPWS5OU6YWU7Y3KO

not attested not anchored not stored refs pending

Steiner Forest Orientation Problems

Guy Kortsarz, Marek Cygan, Zeev Nutov

arxiv:1112.2273 v2 · 2011-12-10 · cs.DS

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

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	2026-05-18T03:50:48.584828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2dcf1eb57a8850fb4baea7b16a7f1b53b07098a8c70526f32f8596c1c4faa93b

Aliases

arxiv: 1112.2273 · arxiv_version: 1112.2273v2 · doi: 10.48550/arxiv.1112.2273 · pith_short_12: FXHR5NL2RBIP · pith_short_16: FXHR5NL2RBIPWS5O · pith_short_8: FXHR5NL2

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/FXHR5NL2RBIPWS5OU6YWU7Y3KO \
  | 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: 2dcf1eb57a8850fb4baea7b16a7f1b53b07098a8c70526f32f8596c1c4faa93b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ca880e1b90dfb1f854af401cd4e9ad5166346c3c78034b207f7eb653f211b75",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-12-10T12:24:13Z",
    "title_canon_sha256": "8e9104b10e7170f00451eb0b33e7267ce0c0dced9cb6f876bcf66259a865f7d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2273",
    "kind": "arxiv",
    "version": 2
  }
}