Pith Number

pith:XMNVQVB6

pith:2017:XMNVQVB644ASOTXW5R7CEG3HVG

not attested not anchored not stored refs pending

A Light Modality for Recursion

Paula Severi

arxiv:1801.00285 v5 · 2017-12-31 · cs.LO · cs.PL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XMNVQVB644ASOTXW5R7CEG3HVG}

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	2026-07-05T06:23:22.649297Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb1b58543ee701274ef6ec7e221b67a9b198bc1f3752e8d9a41746e59acb7a41

Aliases

arxiv: 1801.00285 · arxiv_version: 1801.00285v5 · doi: 10.48550/arxiv.1801.00285 · pith_short_12: XMNVQVB644AS · pith_short_16: XMNVQVB644ASOTXW · pith_short_8: XMNVQVB6

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/XMNVQVB644ASOTXW5R7CEG3HVG \
  | 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: bb1b58543ee701274ef6ec7e221b67a9b198bc1f3752e8d9a41746e59acb7a41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f33da210e7e2cf16c7b610387b46dd00bf01fc97e63c8459d7a3f4268ecf832",
    "cross_cats_sorted": [
      "cs.PL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-12-31T14:02:33Z",
    "title_canon_sha256": "36dc966f2939c95004a5f883521f625740ff95fa8af542316a88822802ebdcea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.00285",
    "kind": "arxiv",
    "version": 5
  }
}