Pith Number

pith:NFJVSIX6

pith:2018:NFJVSIX6ELFSB7UABAC7S2OE3P

not attested not anchored not stored refs pending

Alternative Characterizations of Fitch's Xenology Relation

Carsten R. Seemann, Marc Hellmuth

arxiv:1811.12661 v1 · 2018-11-30 · 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{NFJVSIX6ELFSB7UABAC7S2OE3P}

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	2026-07-05T03:23:02.670744Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69535922fe22cb20fe800805f969c4dbf727c9b2e6511c82a7e0a1b8f01fbf19

Aliases

arxiv: 1811.12661 · arxiv_version: 1811.12661v1 · doi: 10.48550/arxiv.1811.12661 · pith_short_12: NFJVSIX6ELFS · pith_short_16: NFJVSIX6ELFSB7UA · pith_short_8: NFJVSIX6

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/NFJVSIX6ELFSB7UABAC7S2OE3P \
  | 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: 69535922fe22cb20fe800805f969c4dbf727c9b2e6511c82a7e0a1b8f01fbf19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f30988e6d33ff802f27effde401d3e8ec750cf6a2950d8bf55ac5e597d9e897d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-11-30T08:06:48Z",
    "title_canon_sha256": "6f3cc70a164bb622922d09d43d0ff296a39ea65fe66d6c3a7f673dc189faa3a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.12661",
    "kind": "arxiv",
    "version": 1
  }
}