Pith Number

pith:2VITCXS2

pith:2017:2VITCXS2PYC6GWGWZDFDID52VK

not attested not anchored not stored refs pending

A modal typing system for self-referential programs and specifications

Hiroshi Nakano

arxiv:1703.09907 v1 · 2017-03-29 · 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{2VITCXS2PYC6GWGWZDFDID52VK}

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	2026-05-18T00:47:39.063413Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d551315e5a7e05e358d6c8ca340fbaaabf5b48bf73ada7fbc64a513d2964cfbf

Aliases

arxiv: 1703.09907 · arxiv_version: 1703.09907v1 · doi: 10.48550/arxiv.1703.09907 · pith_short_12: 2VITCXS2PYC6 · pith_short_16: 2VITCXS2PYC6GWGW · pith_short_8: 2VITCXS2

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/2VITCXS2PYC6GWGWZDFDID52VK \
  | 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: d551315e5a7e05e358d6c8ca340fbaaabf5b48bf73ada7fbc64a513d2964cfbf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "29d7f5c3523e7c8975961239b5391ab25cae64a9b076c1a22dd94f24a5b51fa4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-03-29T07:03:52Z",
    "title_canon_sha256": "5b1bd78c26b804bb364c9a94ab536708cd886fc729408cf68a1ced56ac276e3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09907",
    "kind": "arxiv",
    "version": 1
  }
}