Pith Number

pith:U75HFNFZ

pith:2012:U75HFNFZIKZVRWFBVNVYGPNUOW

not attested not anchored not stored refs pending

Computer-Assisted Program Reasoning Based on a Relational Semantics of Programs

Wolfgang Schreiner

arxiv:1202.4834 v1 · 2012-02-22 · cs.LO · cs.MS · cs.PL · cs.SC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U75HFNFZIKZVRWFBVNVYGPNUOW}

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	2026-05-18T04:01:40.495842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a7fa72b4b942b358d8a1ab6b833db4758a982941dd06bf44617250dd620de081

Aliases

arxiv: 1202.4834 · arxiv_version: 1202.4834v1 · doi: 10.48550/arxiv.1202.4834 · pith_short_12: U75HFNFZIKZV · pith_short_16: U75HFNFZIKZVRWFB · pith_short_8: U75HFNFZ

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/U75HFNFZIKZVRWFBVNVYGPNUOW \
  | 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: a7fa72b4b942b358d8a1ab6b833db4758a982941dd06bf44617250dd620de081

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2eb6c266aa1bfd609216496340d113e4529bb1df15be2949e0ec6f83356dc59",
    "cross_cats_sorted": [
      "cs.MS",
      "cs.PL",
      "cs.SC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-02-22T06:42:11Z",
    "title_canon_sha256": "cdab63fc49ac017f4fe0145935fbf4246ef439d79e8ae32240e008c98dda1b70"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.4834",
    "kind": "arxiv",
    "version": 1
  }
}