Pith Number

pith:VE3MH5NX

pith:2017:VE3MH5NXFBCYIP6A2VQJKZOUPR

not attested not anchored not stored refs pending

An Algebraic Treatment of Recursion

Rob van Glabbeek

arxiv:1702.07838 v1 · 2017-02-25 · 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{VE3MH5NXFBCYIP6A2VQJKZOUPR}

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	2026-05-18T00:49:56.902850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a936c3f5b72845843fc0d5609565d47c4a362c6f01e162f80fb4407b82248671

Aliases

arxiv: 1702.07838 · arxiv_version: 1702.07838v1 · doi: 10.48550/arxiv.1702.07838 · pith_short_12: VE3MH5NXFBCY · pith_short_16: VE3MH5NXFBCYIP6A · pith_short_8: VE3MH5NX

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/VE3MH5NXFBCYIP6A2VQJKZOUPR \
  | 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: a936c3f5b72845843fc0d5609565d47c4a362c6f01e162f80fb4407b82248671

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0689e10b645bcaf659585a6a2225e88fdcfc0ddefc0be2fe03881e6ce7204287",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-02-25T06:53:53Z",
    "title_canon_sha256": "fd0a0fdb4a5f263013f2974d8688815e18fec81d128cf152e3f4c9247c79ebba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.07838",
    "kind": "arxiv",
    "version": 1
  }
}