Pith Number

pith:PNIPF23F

pith:2018:PNIPF23FBING74Y5SX2HBHUXVX

not attested not anchored not stored refs pending

Non-crossing geometric spanning trees with bounded degree and monochromatic leaves on bicolored point sets

David Orden, Kenta Noguchi, Mikio Kano

arxiv:1812.02866 v1 · 2018-12-07 · cs.DM · 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{PNIPF23FBING74Y5SX2HBHUXVX}

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	2026-05-17T23:58:51.618522Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b50f2eb650a1a6ff31d95f4709e97ade514c552b08850f4eed8ada5dcf53c38

Aliases

arxiv: 1812.02866 · arxiv_version: 1812.02866v1 · doi: 10.48550/arxiv.1812.02866 · pith_short_12: PNIPF23FBING · pith_short_16: PNIPF23FBING74Y5 · pith_short_8: PNIPF23F

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/PNIPF23FBING74Y5SX2HBHUXVX \
  | 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: 7b50f2eb650a1a6ff31d95f4709e97ade514c552b08850f4eed8ada5dcf53c38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fe97406c8a7002f80c01d78d9cb160019289ed564c19250f922acb25824593a",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2018-12-07T01:17:36Z",
    "title_canon_sha256": "31f99b1d3ae2cdfcd9a9fcec3c558dd8fbbe9998320e460f277b9e985b676b9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.02866",
    "kind": "arxiv",
    "version": 1
  }
}