Pith Number

pith:ZJ4BDLN6

pith:2021:ZJ4BDLN6E6YSPZXNQ4EYTPUZ4T

not attested not anchored not stored refs pending

Beginners' Quest to Formalize Mathematics: A Feasibility Study in Isabelle

Abhik Pal, Benedikt Stock, Jonas Bayer, Marco David

arxiv:2106.12351 v1 · 2021-06-23 · 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{ZJ4BDLN6E6YSPZXNQ4EYTPUZ4T}

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	2026-07-05T02:51:45.088195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca7811adbe27b127e6ed870989be99e4c71cd76381252eed230dbd51afcf72c2

Aliases

arxiv: 2106.12351 · arxiv_version: 2106.12351v1 · doi: 10.48550/arxiv.2106.12351 · pith_short_12: ZJ4BDLN6E6YS · pith_short_16: ZJ4BDLN6E6YSPZXN · pith_short_8: ZJ4BDLN6

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/ZJ4BDLN6E6YSPZXNQ4EYTPUZ4T \
  | 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: ca7811adbe27b127e6ed870989be99e4c71cd76381252eed230dbd51afcf72c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a28397af912a9a35c08632375c8a2a6b599f39305a71af50f1997616bfe60a1e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2021-06-23T12:39:19Z",
    "title_canon_sha256": "d21102647e47d35bc1219691247cb42dac8ef568e2a46c9f351a9f7ace7928b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2106.12351",
    "kind": "arxiv",
    "version": 1
  }
}