Pith Number

pith:PYGAY3IY

pith:2015:PYGAY3IYZI2XZYCICBGBYVMEG7

not attested not anchored not stored refs pending

On excluded minors of connectivity 2 for the class of frame matroids

Daryl Funk, Irene Pivotto, Matt DeVos

arxiv:1502.06896 v2 · 2015-02-24 · 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{PYGAY3IYZI2XZYCICBGBYVMEG7}

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	2026-05-18T01:00:10.386098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e0c0c6d18ca357ce048104c1c558437e3282abbda9919bc2a0ffd6e57bb90ee

Aliases

arxiv: 1502.06896 · arxiv_version: 1502.06896v2 · doi: 10.48550/arxiv.1502.06896 · pith_short_12: PYGAY3IYZI2X · pith_short_16: PYGAY3IYZI2XZYCI · pith_short_8: PYGAY3IY

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/PYGAY3IYZI2XZYCICBGBYVMEG7 \
  | 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: 7e0c0c6d18ca357ce048104c1c558437e3282abbda9919bc2a0ffd6e57bb90ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc4c3c406727dc1176f6dd22c38849d5c2154e3c82d9596ebbcfabdb811a3a0c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-02-24T17:58:10Z",
    "title_canon_sha256": "2c54874bcc6fb940b56dd38a6a28fbf6fd3a0a67d7bf449940c04ea69514b45d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.06896",
    "kind": "arxiv",
    "version": 2
  }
}