Pith Number

pith:MC7JC4IZ

pith:2017:MC7JC4IZHX3YDCHT6RJLTPXLSS

not attested not anchored not stored refs pending

Lewis meets Brouwer: constructive strict implication

Albert Visser, Tadeusz Litak

arxiv:1708.02143 v3 · 2017-08-07 · 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{MC7JC4IZHX3YDCHT6RJLTPXLSS}

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	2026-05-18T00:31:50.634573Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

60be9171193df78188f3f452b9beeb94947f60f6294751f389ef2c5b9b06cbfe

Aliases

arxiv: 1708.02143 · arxiv_version: 1708.02143v3 · doi: 10.48550/arxiv.1708.02143 · pith_short_12: MC7JC4IZHX3Y · pith_short_16: MC7JC4IZHX3YDCHT · pith_short_8: MC7JC4IZ

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/MC7JC4IZHX3YDCHT6RJLTPXLSS \
  | 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: 60be9171193df78188f3f452b9beeb94947f60f6294751f389ef2c5b9b06cbfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "045a2f4c8786400b49eea995c6db3c25b63dad4e876c0c145f57e9dccc5e6889",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2017-08-07T14:52:34Z",
    "title_canon_sha256": "6896de5396df7e3c6ab584b3dc0e6e65a0144020defa9f814c795fbc4dfe2fff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.02143",
    "kind": "arxiv",
    "version": 3
  }
}