Pith Number

pith:B62LPXDF

pith:2019:B62LPXDFYRSMA6FUVG45Q4OOFR

not attested not anchored not stored refs pending

Matroids and their Dressians

David E Speyer, Madeline Brandt

arxiv:1902.05592 v2 · 2019-02-14 · 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{B62LPXDFYRSMA6FUVG45Q4OOFR}

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.

Cited by

1 paper in Pith

Perfect matroids over hyperfields

Receipt and verification

First computed	2026-07-05T01:24:14.571600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fb4b7dc65c464c078b4a9b9d871ce2c6518e08fe478c8e7c8ad402a48c43337

Aliases

arxiv: 1902.05592 · arxiv_version: 1902.05592v2 · doi: 10.48550/arxiv.1902.05592 · pith_short_12: B62LPXDFYRSM · pith_short_16: B62LPXDFYRSMA6FU · pith_short_8: B62LPXDF

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/B62LPXDFYRSMA6FUVG45Q4OOFR \
  | 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: 0fb4b7dc65c464c078b4a9b9d871ce2c6518e08fe478c8e7c8ad402a48c43337

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd7f2e2a81623b0b3d2f1ac73c8ef1d99988ee8d5fd63900be12971618da198e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-02-14T20:20:38Z",
    "title_canon_sha256": "1e2112da58f07d93afa8e95536b0351caf0ec3c54ead2c64506080c59df78f9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05592",
    "kind": "arxiv",
    "version": 2
  }
}