Pith Number

pith:ZIIN5WCN

pith:2016:ZIIN5WCNR4FHZEXWNT26KSTUBV

not attested not anchored not stored refs pending

How many delta-matroids are there?

Daryl Funk, Dillon Mayhew, Steven D. Noble

arxiv:1609.08244 v2 · 2016-09-27 · 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{ZIIN5WCNR4FHZEXWNT26KSTUBV}

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	2026-05-18T00:32:21.198110Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca10ded84d8f0a7c92f66cf5e54a740d5657504e7e2018a7509defe2e829830b

Aliases

arxiv: 1609.08244 · arxiv_version: 1609.08244v2 · doi: 10.48550/arxiv.1609.08244 · pith_short_12: ZIIN5WCNR4FH · pith_short_16: ZIIN5WCNR4FHZEXW · pith_short_8: ZIIN5WCN

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/ZIIN5WCNR4FHZEXWNT26KSTUBV \
  | 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: ca10ded84d8f0a7c92f66cf5e54a740d5657504e7e2018a7509defe2e829830b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9d67a88b759e81892407ac1f959a20f7d4bcfd755db3639c3bab79b1fb9303b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-09-27T02:52:56Z",
    "title_canon_sha256": "4b287ab9b373abf38376d965f8f3856c7401b6cd0ea6e00051e876beffdd1910"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.08244",
    "kind": "arxiv",
    "version": 2
  }
}