Pith Number

pith:QVFG6KYB

pith:2018:QVFG6KYBCRTPSXIJZB6ENMA66F

not attested not anchored not stored refs pending

Generically Computable Equivalence Structures and Isomorphisms

Douglas Cenzer, Valentina Harizanov, Wesley Calvert

arxiv:1808.02782 v1 · 2018-08-08 · 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{QVFG6KYBCRTPSXIJZB6ENMA66F}

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	2026-05-18T00:08:32.203624Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

854a6f2b011466f95d09c87c46b01ef14453fc021ca4ef6bcde7560750f589da

Aliases

arxiv: 1808.02782 · arxiv_version: 1808.02782v1 · doi: 10.48550/arxiv.1808.02782 · pith_short_12: QVFG6KYBCRTP · pith_short_16: QVFG6KYBCRTPSXIJ · pith_short_8: QVFG6KYB

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/QVFG6KYBCRTPSXIJZB6ENMA66F \
  | 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: 854a6f2b011466f95d09c87c46b01ef14453fc021ca4ef6bcde7560750f589da

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cf0dd37b349b782de50c0976f7b241a701dd202a431e2e1cc4efb90f1d765e5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-08-08T13:56:28Z",
    "title_canon_sha256": "7e2b1eb619de885cffb4f657e0686c5f2ccc3775aebd3caccb302ea73883482e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.02782",
    "kind": "arxiv",
    "version": 1
  }
}