Pith Number

pith:RRGVMZ5N

pith:2008:RRGVMZ5NOFOT2UZ6RW4S5ZX7HA

not attested not anchored not stored refs pending

A General Framework for Sound and Complete Floyd-Hoare Logics

Erik A. Mathiesen, Paulo Oliva, Rob Arthan, Ursula Martin

arxiv:0807.1016 v1 · 2008-07-07 · cs.LO · cs.OH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RRGVMZ5NOFOT2UZ6RW4S5ZX7HA}

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	2026-05-18T03:26:21.087383Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c4d5667ad715d3d533e8db92ee6ff381c43fcca286cac2adb5d8e08242e8265

Aliases

arxiv: 0807.1016 · arxiv_version: 0807.1016v1 · doi: 10.48550/arxiv.0807.1016 · pith_short_12: RRGVMZ5NOFOT · pith_short_16: RRGVMZ5NOFOT2UZ6 · pith_short_8: RRGVMZ5N

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/RRGVMZ5NOFOT2UZ6RW4S5ZX7HA \
  | 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: 8c4d5667ad715d3d533e8db92ee6ff381c43fcca286cac2adb5d8e08242e8265

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a62974e97d68d33ce551be45d08133c06878aa8f3daaec448eb82c74f59c2d9",
    "cross_cats_sorted": [
      "cs.OH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2008-07-07T13:40:00Z",
    "title_canon_sha256": "65d5d7ec2ecae92971bd2df4c27a8554e2fda28deb4893a6b7b97a479b8580c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.1016",
    "kind": "arxiv",
    "version": 1
  }
}