Pith Number

pith:WHV2EX3K

pith:2017:WHV2EX3KKM3K47HQTTLNKLX3SZ

not attested not anchored not stored refs pending

On zeros of the characteristic polynomial of matroids of bounded tree-width

Carolyn Chun, Criel Merino, Rhiannon Hall, Steven Noble

arxiv:1703.02393 v2 · 2017-03-07 · 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{WHV2EX3KKM3K47HQTTLNKLX3SZ}

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	2026-05-18T00:49:06.157531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b1eba25f6a5336ae7cf09cd6d52efb965cceaa53dbe26f7b334eab9d4bae984c

Aliases

arxiv: 1703.02393 · arxiv_version: 1703.02393v2 · doi: 10.48550/arxiv.1703.02393 · pith_short_12: WHV2EX3KKM3K · pith_short_16: WHV2EX3KKM3K47HQ · pith_short_8: WHV2EX3K

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/WHV2EX3KKM3K47HQTTLNKLX3SZ \
  | 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: b1eba25f6a5336ae7cf09cd6d52efb965cceaa53dbe26f7b334eab9d4bae984c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c477d39eca7b52323e7be362817d38cb0d240032dc3aac7c768ab90d0a8f325",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-03-07T14:16:00Z",
    "title_canon_sha256": "07f4de1fe063f99d12535699c267b73d68fc8fe2d5b3c604ba760ef49b52ef78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.02393",
    "kind": "arxiv",
    "version": 2
  }
}