Pith Number

pith:QJYFQ3VH

pith:2018:QJYFQ3VHGT5PYBN3OPJYRO4QAB

not attested not anchored not stored refs pending

Definability in the embeddability ordering of finite directed graphs, II

\'Ad\'am Kunos

arxiv:1806.07871 v1 · 2018-06-20 · math.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QJYFQ3VHGT5PYBN3OPJYRO4QAB}

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	2026-05-18T00:12:46.391449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8270586ea734fafc05bb73d388bb9000598bd425222f7809e27b47dade995692

Aliases

arxiv: 1806.07871 · arxiv_version: 1806.07871v1 · doi: 10.48550/arxiv.1806.07871 · pith_short_12: QJYFQ3VHGT5P · pith_short_16: QJYFQ3VHGT5PYBN3 · pith_short_8: QJYFQ3VH

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/QJYFQ3VHGT5PYBN3OPJYRO4QAB \
  | 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: 8270586ea734fafc05bb73d388bb9000598bd425222f7809e27b47dade995692

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82de02fe5292c89a451691014c852ed1f7cf45dc938af220f9a64a937137a9cf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-06-20T17:57:40Z",
    "title_canon_sha256": "ecd658efeda7097af2c8306fb6cdd6085b90d1b7e7a3e41655feb74842c9b9e6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.07871",
    "kind": "arxiv",
    "version": 1
  }
}