Pith Number

pith:DSLAWJDW

pith:2019:DSLAWJDWVHBAMZIJYX4AO2RJZB

not attested not anchored not stored refs pending

Isabelle technology for the Archive of Formal Proofs with application to MMT

Makarius Wenzel

arxiv:1905.07244 v2 · 2019-05-17 · 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{DSLAWJDWVHBAMZIJYX4AO2RJZB}

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	2026-05-17T23:43:34.222352Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c960b2476a9c2066509c5f8076a29c8669cebbba01cfee1ee72e1862c38aac2

Aliases

arxiv: 1905.07244 · arxiv_version: 1905.07244v2 · doi: 10.48550/arxiv.1905.07244 · pith_short_12: DSLAWJDWVHBA · pith_short_16: DSLAWJDWVHBAMZIJ · pith_short_8: DSLAWJDW

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/DSLAWJDWVHBAMZIJYX4AO2RJZB \
  | 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: 1c960b2476a9c2066509c5f8076a29c8669cebbba01cfee1ee72e1862c38aac2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ec508f2993e56914eda58b2badfb374c1d14487df7078ba34d3d7f297783521",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-05-17T13:06:00Z",
    "title_canon_sha256": "60c57bbbe51b6b778e80f838422beffad296920fb3da991a924dcc79fec272f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.07244",
    "kind": "arxiv",
    "version": 2
  }
}