Pith Number

pith:YXUF7IG3

pith:2015:YXUF7IG3YS2X25NZABNIA6X36M

not attested not anchored not stored refs pending

NaDeA: A Natural Deduction Assistant with a Formalization in Isabelle

Alexander Birch Jensen, Anders Schlichtkrull, J{\o}rgen Villadsen

arxiv:1507.04002 v1 · 2015-07-14 · cs.CY · 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{YXUF7IG3YS2X25NZABNIA6X36M}

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	2026-05-18T01:36:49.341507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5e85fa0dbc4b57d75b9005a807afbf308b20438282c14982713cc990500fbb6

Aliases

arxiv: 1507.04002 · arxiv_version: 1507.04002v1 · doi: 10.48550/arxiv.1507.04002 · pith_short_12: YXUF7IG3YS2X · pith_short_16: YXUF7IG3YS2X25NZ · pith_short_8: YXUF7IG3

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/YXUF7IG3YS2X25NZABNIA6X36M \
  | 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: c5e85fa0dbc4b57d75b9005a807afbf308b20438282c14982713cc990500fbb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "84d0d6d1d0c25121cf76c6af511d57ff17528e291b45278aa4af52eae4b5b59e",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2015-07-14T20:02:30Z",
    "title_canon_sha256": "a83d181a894a6870d8adeef2b0faab47b5710160ca62669294ee22be499b41fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04002",
    "kind": "arxiv",
    "version": 1
  }
}