Pith Number

pith:MZHRGPON

pith:2008:MZHRGPONS2PCKVP4JUNKLYFOXQ

not attested not anchored not stored refs pending

Extracting Programs from Constructive HOL Proofs via IZF Set-Theoretic<br> Semantics

Robert Constable, Wojciech Moczydlowski

arxiv:0806.1281 v2 · 2008-06-07 · 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{MZHRGPONS2PCKVP4JUNKLYFOXQ}

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	2026-05-18T01:37:42.431121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

664f133dcd969e2555fc4d1aa5e0aebc3f153755585d5ee90a3cfaf2d14f6d04

Aliases

arxiv: 0806.1281 · arxiv_version: 0806.1281v2 · doi: 10.48550/arxiv.0806.1281 · pith_short_12: MZHRGPONS2PC · pith_short_16: MZHRGPONS2PCKVP4 · pith_short_8: MZHRGPON

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/MZHRGPONS2PCKVP4JUNKLYFOXQ \
  | 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: 664f133dcd969e2555fc4d1aa5e0aebc3f153755585d5ee90a3cfaf2d14f6d04

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7a0bf5a789eada79258bb7d8d82c9f8073ba390aa399cdc3ab9eb36bb5ed6ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2008-06-07T13:43:46Z",
    "title_canon_sha256": "2bc6538191adc6224f94e8338764d625432f5718bbddeb58c3c981b29918358e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.1281",
    "kind": "arxiv",
    "version": 2
  }
}