Pith Number

pith:7OFFXATC

pith:2014:7OFFXATC57YACQVSCSXZHOFJTT

not attested not anchored not stored refs pending

Self-embeddings of computable trees

Bj{\o}rn Kjos-Hanssen, James H. Schmerl, Manuel Lerman, Reed Solomon, Stephen Binns

arxiv:1408.2286 v1 · 2014-08-11 · 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{7OFFXATC57YACQVSCSXZHOFJTT}

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	2026-05-18T02:45:29.802215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fb8a5b8262eff00142b214af93b8a99ced997ba7b8744dabc06d4f2482cb3851

Aliases

arxiv: 1408.2286 · arxiv_version: 1408.2286v1 · doi: 10.48550/arxiv.1408.2286 · pith_short_12: 7OFFXATC57YA · pith_short_16: 7OFFXATC57YACQVS · pith_short_8: 7OFFXATC

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/7OFFXATC57YACQVSCSXZHOFJTT \
  | 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: fb8a5b8262eff00142b214af93b8a99ced997ba7b8744dabc06d4f2482cb3851

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28af5b603ddb6add734687cf3d796808a25db1869dfdb753f4a1a5449ccd7842",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-08-11T00:02:18Z",
    "title_canon_sha256": "f01755314831525bcc286fab6d4651a84a633fdc3c95422cf18da0006b5b0180"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2286",
    "kind": "arxiv",
    "version": 1
  }
}