Pith Number

pith:XUMUW3IF

pith:2016:XUMUW3IFL2H57EFVNMULJXKDAP

not attested not anchored not stored refs pending

The Kelmans-Seymour conjecture II: 2-vertices in $K_4^-$

Dawei He, Xingxing Yu, Yan Wang

arxiv:1602.07557 v1 · 2016-02-24 · 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{XUMUW3IFL2H57EFVNMULJXKDAP}

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	2026-05-18T01:20:02.654569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd194b6d055e8fdf90b56b28b4dd4303d7353a8a83b7956c51cc241befbdcc87

Aliases

arxiv: 1602.07557 · arxiv_version: 1602.07557v1 · doi: 10.48550/arxiv.1602.07557 · pith_short_12: XUMUW3IFL2H5 · pith_short_16: XUMUW3IFL2H57EFV · pith_short_8: XUMUW3IF

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/XUMUW3IFL2H57EFVNMULJXKDAP \
  | 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: bd194b6d055e8fdf90b56b28b4dd4303d7353a8a83b7956c51cc241befbdcc87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d576c460b97ede0026ebccf4e6f00deb5d62492d773fa53ef9ec3f6a7ed584e1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-02-24T15:27:02Z",
    "title_canon_sha256": "dea12b7cfe244cf5e91f354c30586899b70042c8ac17f80057e0aa55900bd275"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.07557",
    "kind": "arxiv",
    "version": 1
  }
}