Pith Number

pith:HTWRMQNR

pith:2015:HTWRMQNROAC7OOLHNM6WD22CW4

not attested not anchored not stored refs pending

A representation of antimatroids by Horn rules and its application to educational systems

Hiroshi Hirai, Hiyori Yoshikawa, Kazuhisa Makino

arxiv:1508.05465 v4 · 2015-08-22 · math.CO · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HTWRMQNROAC7OOLHNM6WD22CW4}

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	2026-05-18T00:06:12.766187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ced1641b17005f739676b3d61eb42b73ed9b3f19fc0fe7b22b5e4e687569b30

Aliases

arxiv: 1508.05465 · arxiv_version: 1508.05465v4 · doi: 10.48550/arxiv.1508.05465 · pith_short_12: HTWRMQNROAC7 · pith_short_16: HTWRMQNROAC7OOLH · pith_short_8: HTWRMQNR

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/HTWRMQNROAC7OOLHNM6WD22CW4 \
  | 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: 3ced1641b17005f739676b3d61eb42b73ed9b3f19fc0fe7b22b5e4e687569b30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18fb95db5ca5452d0a2cffd7e26c320786a5ba45fa79089b9d2016a29fe650e8",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-08-22T03:50:10Z",
    "title_canon_sha256": "41653d68f68a6619b3267d2111689e08075aac9eb5296f2884ac69861ec1c0eb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05465",
    "kind": "arxiv",
    "version": 4
  }
}