Pith Number

pith:SJ7ST2D6

pith:2017:SJ7ST2D6VYHUVUBYR6NXLP7FPZ

not attested not anchored not stored refs pending

On Seymour's Second Neighborhood Conjecture of m-free Digraphs

Hao Liang, Jun-Ming Xu

arxiv:1701.00328 v1 · 2017-01-02 · 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{SJ7ST2D6VYHUVUBYR6NXLP7FPZ}

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	2026-05-18T00:53:35.855790Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

927f29e87eae0f4ad0388f9b75bfe57e65e9b2def70cb15a1a9a3599299f21d7

Aliases

arxiv: 1701.00328 · arxiv_version: 1701.00328v1 · doi: 10.48550/arxiv.1701.00328 · pith_short_12: SJ7ST2D6VYHU · pith_short_16: SJ7ST2D6VYHUVUBY · pith_short_8: SJ7ST2D6

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/SJ7ST2D6VYHUVUBYR6NXLP7FPZ \
  | 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: 927f29e87eae0f4ad0388f9b75bfe57e65e9b2def70cb15a1a9a3599299f21d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b02a8e2bd7a86fd050358c9557e5eedea4cddd01bc0cd906996dae01d8ac71d5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-02T08:01:58Z",
    "title_canon_sha256": "787afd22d4d26cfe2e5e704669389d248b83b098a5b1749317a657fcd34537df"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.00328",
    "kind": "arxiv",
    "version": 1
  }
}