Pith Number

pith:5SVISUK4

pith:2016:5SVISUK4XS2S2HEMFV543RZUNH

not attested not anchored not stored refs pending

Hanf Number for Scott Sentences of Computable Structures

Ioannis Souldatos, Julia Knight, Sergey Goncharov

arxiv:1602.01156 v2 · 2016-02-02 · 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{5SVISUK4XS2S2HEMFV543RZUNH}

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	2026-05-18T01:00:45.945778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecaa89515cbcb52d1c8c2d7bcdc73469c8663eacafb07932b4f7c2536d219f90

Aliases

arxiv: 1602.01156 · arxiv_version: 1602.01156v2 · doi: 10.48550/arxiv.1602.01156 · pith_short_12: 5SVISUK4XS2S · pith_short_16: 5SVISUK4XS2S2HEM · pith_short_8: 5SVISUK4

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/5SVISUK4XS2S2HEMFV543RZUNH \
  | 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: ecaa89515cbcb52d1c8c2d7bcdc73469c8663eacafb07932b4f7c2536d219f90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9844f43d1ab1aa772f83a752f280e6ee2d9770794783d470776052c11e529b9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2016-02-02T23:52:28Z",
    "title_canon_sha256": "9e05cd324e34240e3090e131ca7c1254113556048ec978e3d371629275dd8fce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.01156",
    "kind": "arxiv",
    "version": 2
  }
}