Pith Number

pith:J5OWVMXA

pith:2019:J5OWVMXA6JI2V2BJRWJ2UTCZ2Z

not attested not anchored not stored refs pending

Perfect digraphs

C\^andida Nunes da Silva, Maycon Sambinelli, Orlando Lee

arxiv:1904.02799 v1 · 2019-04-04 · 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{J5OWVMXA6JI2V2BJRWJ2UTCZ2Z}

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	2026-05-17T23:49:19.615279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f5d6ab2e0f251aae8298d93aa4c59d6412a23629e2a3aa743922f54d8b50f33

Aliases

arxiv: 1904.02799 · arxiv_version: 1904.02799v1 · doi: 10.48550/arxiv.1904.02799 · pith_short_12: J5OWVMXA6JI2 · pith_short_16: J5OWVMXA6JI2V2BJ · pith_short_8: J5OWVMXA

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/J5OWVMXA6JI2V2BJRWJ2UTCZ2Z \
  | 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: 4f5d6ab2e0f251aae8298d93aa4c59d6412a23629e2a3aa743922f54d8b50f33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7796f49eb9619b08a2683effcc3338e85f139c3b3f425c392104494a32035aff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-04-04T21:45:49Z",
    "title_canon_sha256": "cf81365b8f1c07884e1e54c84b8d534ce142f96eb6638bad17d4dea604897965"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02799",
    "kind": "arxiv",
    "version": 1
  }
}