Pith Number

pith:2XJR6XZL

pith:2017:2XJR6XZLE7M5GJ7DI7QWW22CEQ

not attested not anchored not stored refs pending

Type homogeneity is not a restriction for safe recursion schemes

William Blum

arxiv:1701.02118 v1 · 2017-01-09 · 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{2XJR6XZLE7M5GJ7DI7QWW22CEQ}

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	2026-05-18T00:53:11.610925Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d5d31f5f2b27d9d327e347e16b6b42242afb7d0f7b66c763dec41664ac06445f

Aliases

arxiv: 1701.02118 · arxiv_version: 1701.02118v1 · doi: 10.48550/arxiv.1701.02118 · pith_short_12: 2XJR6XZLE7M5 · pith_short_16: 2XJR6XZLE7M5GJ7D · pith_short_8: 2XJR6XZL

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/2XJR6XZLE7M5GJ7DI7QWW22CEQ \
  | 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: d5d31f5f2b27d9d327e347e16b6b42242afb7d0f7b66c763dec41664ac06445f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2334d386cfe32fb20a5cf3f8ed36680b7f32d17e735d444ca20e8801c7e1d788",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-01-09T10:07:50Z",
    "title_canon_sha256": "5039bfd869c09f218d2ed0c462d4adbea7adaf549c3c0a87b98a14a36be2dd0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.02118",
    "kind": "arxiv",
    "version": 1
  }
}