Pith Number

pith:FNL6DNCY

pith:2015:FNL6DNCY4VKYZGGQPWM73U4JRY

not attested not anchored not stored refs pending

Rainbow connection in some digraphs

Jes\'us Alva-Samos, Juan Jos\'e Montellano-Ballesteros

arxiv:1504.01721 v1 · 2015-04-07 · 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{FNL6DNCY4VKYZGGQPWM73U4JRY}

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	2026-05-18T02:19:26.336866Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b57e1b458e5558c98d07d99fdd3898e33750cbb15d98117976d4b907bf258d8

Aliases

arxiv: 1504.01721 · arxiv_version: 1504.01721v1 · doi: 10.48550/arxiv.1504.01721 · pith_short_12: FNL6DNCY4VKY · pith_short_16: FNL6DNCY4VKYZGGQ · pith_short_8: FNL6DNCY

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/FNL6DNCY4VKYZGGQPWM73U4JRY \
  | 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: 2b57e1b458e5558c98d07d99fdd3898e33750cbb15d98117976d4b907bf258d8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4e0771f98156adbefb6db1494b1c2ef14e6c31244c4553168326d294bfb6b2b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-04-07T19:55:12Z",
    "title_canon_sha256": "6b0849d18d37a34c5d03ce73ef56ca0f449ebd085d4ef8fe2b4e92c5fa0a2167"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.01721",
    "kind": "arxiv",
    "version": 1
  }
}