Pith Number

pith:XNQIHFCO

pith:2016:XNQIHFCO6ZV434RYKEEUWYYIFV

not attested not anchored not stored refs pending

On heterochromatic out-directed spanning trees in tournaments

Eduardo Rivera Campo, Juan Jos\'e Montellano-Ballesteros

arxiv:1601.04170 v1 · 2016-01-16 · 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{XNQIHFCO6ZV434RYKEEUWYYIFV}

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	2026-05-18T01:22:45.747139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb6083944ef66bcdf23851094b63082d750d6822573f8ba5103037fd9effe5b2

Aliases

arxiv: 1601.04170 · arxiv_version: 1601.04170v1 · doi: 10.48550/arxiv.1601.04170 · pith_short_12: XNQIHFCO6ZV4 · pith_short_16: XNQIHFCO6ZV434RY · pith_short_8: XNQIHFCO

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/XNQIHFCO6ZV434RYKEEUWYYIFV \
  | 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: bb6083944ef66bcdf23851094b63082d750d6822573f8ba5103037fd9effe5b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "14bbecef1ccd30448b3e016068e429becbf23e5a5ace3b13e9096b40c7f914ec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-01-16T14:48:52Z",
    "title_canon_sha256": "ac3f07b7c3cab2539083166caf20560d057a0f9a6be6f8d3cb1d8f5de538d167"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.04170",
    "kind": "arxiv",
    "version": 1
  }
}