Pith Number

pith:XVWFCTT5

pith:2015:XVWFCTT5YZ5H77KQN6FD3NANT2

not attested not anchored not stored refs pending

A Sound and Complete Hoare Logic for Dynamically-Typed, Object-Oriented Programs -- Extended Version --

Bj\"orn Engelmann, Ernst-R\"udiger Olderog

arxiv:1509.08605 v3 · 2015-09-29 · cs.PL · 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{XVWFCTT5YZ5H77KQN6FD3NANT2}

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	2026-05-18T01:23:08.065662Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3

Aliases

arxiv: 1509.08605 · arxiv_version: 1509.08605v3 · doi: 10.48550/arxiv.1509.08605 · pith_short_12: XVWFCTT5YZ5H · pith_short_16: XVWFCTT5YZ5H77KQ · pith_short_8: XVWFCTT5

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/XVWFCTT5YZ5H77KQN6FD3NANT2 \
  | 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: bd6c514e7dc67a7ffd506f8a3db40d9e8a50561932147de78afa97c65511aec3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec71ca620b6fb893e95ddbfbe2f185ae1dac2621c50ee41d2a7efc0956465f72",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2015-09-29T06:38:40Z",
    "title_canon_sha256": "d5a10cfbc82f539c26b270f9c863c763edf00b760b69882bd7e85a6a65cd2fef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.08605",
    "kind": "arxiv",
    "version": 3
  }
}