Pith Number

pith:HOFWXTTP

pith:2016:HOFWXTTPUKTPCMR532CUBNR6JF

not attested not anchored not stored refs pending

The problem of Pi_2-cut-introduction

Alexander Leitsch, Michael Peter Lettmann

arxiv:1611.08208 v2 · 2016-11-24 · 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{HOFWXTTPUKTPCMR532CUBNR6JF}

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	2026-05-18T00:26:08.515659Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b8b6bce6fa2a6f1323dde8540b63e497c6f8e96a42c77f2978d6b373ccbc4ab

Aliases

arxiv: 1611.08208 · arxiv_version: 1611.08208v2 · doi: 10.48550/arxiv.1611.08208 · pith_short_12: HOFWXTTPUKTP · pith_short_16: HOFWXTTPUKTPCMR5 · pith_short_8: HOFWXTTP

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/HOFWXTTPUKTPCMR532CUBNR6JF \
  | 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: 3b8b6bce6fa2a6f1323dde8540b63e497c6f8e96a42c77f2978d6b373ccbc4ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b13dfbfec1f77f42f978ae9d288270f60e6e393b1b950083fd0c08edc3c2667c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-11-24T15:05:39Z",
    "title_canon_sha256": "ec1fc9d6aea2bc7589d5ef7c04670886185ac53bdb890453fdae4689f79dd5ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1611.08208",
    "kind": "arxiv",
    "version": 2
  }
}