Pith Number

pith:DMAG7433

pith:2013:DMAG743327OYSGJPQBDBXMBTGS

not attested not anchored not stored refs pending

Matroids with a modular 4-point line

Rohan Kapadia

arxiv:1309.5329 v2 · 2013-09-20 · 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{DMAG743327OYSGJPQBDBXMBTGS}

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	2026-05-18T02:50:03.318344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b006ff37bd7dd89192f80461bb03334ab46fe90b1d7ee07aa218e124dd6757e

Aliases

arxiv: 1309.5329 · arxiv_version: 1309.5329v2 · doi: 10.48550/arxiv.1309.5329 · pith_short_12: DMAG743327OY · pith_short_16: DMAG743327OYSGJP · pith_short_8: DMAG7433

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/DMAG743327OYSGJPQBDBXMBTGS \
  | 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: 1b006ff37bd7dd89192f80461bb03334ab46fe90b1d7ee07aa218e124dd6757e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34631a6e0fca39ff8e21c6decf700a66453e7bef0cd945aa3db978e241291a5a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-09-20T17:18:30Z",
    "title_canon_sha256": "221f3db8b62f709603b37a1134ddb42985e8d67ed1ab30f829368b218bd08426"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.5329",
    "kind": "arxiv",
    "version": 2
  }
}