Pith Number

pith:P2YGQI7D

pith:2012:P2YGQI7DHQBOVXWY5HUMXSR7F7

not attested not anchored not stored refs pending

Sequence encoding without induction

Emil Je\v{r}\'abek

arxiv:1201.5835 v1 · 2012-01-27 · math.LO · cs.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{P2YGQI7DHQBOVXWY5HUMXSR7F7}

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	2026-05-18T03:52:50.752353Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7eb06823e33c02eaded8e9e8cbca3f2fc9ddae2950285305d131f0df31d48287

Aliases

arxiv: 1201.5835 · arxiv_version: 1201.5835v1 · doi: 10.48550/arxiv.1201.5835 · pith_short_12: P2YGQI7DHQBO · pith_short_16: P2YGQI7DHQBOVXWY · pith_short_8: P2YGQI7D

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/P2YGQI7DHQBOVXWY5HUMXSR7F7 \
  | 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: 7eb06823e33c02eaded8e9e8cbca3f2fc9ddae2950285305d131f0df31d48287

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e6c6f0e558339bef4e64936c1acced03cdd63383d5dd1bf03e021e47063c839",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2012-01-27T17:07:21Z",
    "title_canon_sha256": "548f24ba72b1c7291809b649885e40e9cf4acfc05e4c6bef60cde6da2efbc3fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5835",
    "kind": "arxiv",
    "version": 1
  }
}