Pith Number

pith:F5JXMRGV

pith:2015:F5JXMRGVIRECMWSNHJJUMVULTC

not attested not anchored not stored refs pending

On the reducibility of isomorphism relations

Miguel Moreno, Tapani Hyttinen

arxiv:1509.05291 v1 · 2015-09-17 · 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{F5JXMRGVIRECMWSNHJJUMVULTC}

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	2026-05-18T01:32:44.218026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f537644d54448265a4d3a5346568b989e7e23e25d919844072218fb7f255bef

Aliases

arxiv: 1509.05291 · arxiv_version: 1509.05291v1 · doi: 10.48550/arxiv.1509.05291 · pith_short_12: F5JXMRGVIREC · pith_short_16: F5JXMRGVIRECMWSN · pith_short_8: F5JXMRGV

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/F5JXMRGVIRECMWSNHJJUMVULTC \
  | 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: 2f537644d54448265a4d3a5346568b989e7e23e25d919844072218fb7f255bef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "50b6b035faf481acf509b8cbd0078dbcd8b28f18e1ba17b206660980ea825f61",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-09-17T15:32:32Z",
    "title_canon_sha256": "896bbf82554756bdf8cca3e08af96933241673832dffc81cb99f74d0591a0785"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.05291",
    "kind": "arxiv",
    "version": 1
  }
}