Pith Number

pith:PUF7ZP4P

pith:2014:PUF7ZP4PWGROOHHBEFWOZGITA4

not attested not anchored not stored refs pending

Improving legibility of natural deduction proofs is not trivial

Bialystok, Institute of Computer Science, Karol P\k{a}k (University of Bialystok, Poland)

arxiv:1407.1140 v2 · 2014-07-04 · 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{PUF7ZP4PWGROOHHBEFWOZGITA4}

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	2026-05-18T01:37:35.710366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d0bfcbf8fb1a2e71ce1216cec991307047accd0fc3bcdcc2e4f470a555ba427

Aliases

arxiv: 1407.1140 · arxiv_version: 1407.1140v2 · doi: 10.48550/arxiv.1407.1140 · pith_short_12: PUF7ZP4PWGRO · pith_short_16: PUF7ZP4PWGROOHHB · pith_short_8: PUF7ZP4P

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/PUF7ZP4PWGROOHHBEFWOZGITA4 \
  | 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: 7d0bfcbf8fb1a2e71ce1216cec991307047accd0fc3bcdcc2e4f470a555ba427

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "80d76f397246528660f9f0800505104e41c300358691167dbe1a346ac5d85bbf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-07-04T07:27:50Z",
    "title_canon_sha256": "3e78f721e14739896c8cb517ee853eff43d59789310ccd3abbaf9c48a0846c52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.1140",
    "kind": "arxiv",
    "version": 2
  }
}