Pith Number

pith:YXBYBYX4

pith:2012:YXBYBYX4AN67QQM3DLEJ3J7VWJ

not attested not anchored not stored refs pending

Optimizing Abstract Abstract Machines

David Van Horn, J. Ian Johnson, Matthew Might, Nicholas Labich

arxiv:1211.3722 v4 · 2012-11-15 · cs.PL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YXBYBYX4AN67QQM3DLEJ3J7VWJ}

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	2026-05-18T03:17:44.621891Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5c380e2fc037df8419b1ac89da7f5b24b7019c5694722a9029e812bec4fd4e8

Aliases

arxiv: 1211.3722 · arxiv_version: 1211.3722v4 · doi: 10.48550/arxiv.1211.3722 · pith_short_12: YXBYBYX4AN67 · pith_short_16: YXBYBYX4AN67QQM3 · pith_short_8: YXBYBYX4

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/YXBYBYX4AN67QQM3DLEJ3J7VWJ \
  | 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: c5c380e2fc037df8419b1ac89da7f5b24b7019c5694722a9029e812bec4fd4e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd99bc3b4c68d757b3b29ff28bbffd9388fd3995988cfa8787ab1da06ff2b968",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2012-11-15T20:37:01Z",
    "title_canon_sha256": "bbbdd911e66bda59e850fbf007bb4084dd907aa71d71bdce2c3fd7f25a46c503"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.3722",
    "kind": "arxiv",
    "version": 4
  }
}