Pith Number

pith:PMQDCJGW

pith:2019:PMQDCJGWI63PTPBFTV2RTWHPKF

not attested not anchored not stored refs pending

A constructive proof of dependent choice in classical arithmetic via memoization

\'Etienne Miquey

arxiv:1903.07616 v1 · 2019-03-18 · 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{PMQDCJGWI63PTPBFTV2RTWHPKF}

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	2026-05-17T23:50:40.524783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b203124d647b6f9bc259d7519d8ef517d453835d743371bedee1bec1ca625aa

Aliases

arxiv: 1903.07616 · arxiv_version: 1903.07616v1 · doi: 10.48550/arxiv.1903.07616 · pith_short_12: PMQDCJGWI63P · pith_short_16: PMQDCJGWI63PTPBF · pith_short_8: PMQDCJGW

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/PMQDCJGWI63PTPBFTV2RTWHPKF \
  | 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: 7b203124d647b6f9bc259d7519d8ef517d453835d743371bedee1bec1ca625aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b0da4f465cd0df1736cc54ba214110897e75b6fa0dd80cfe08b6ad211404904",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2019-03-18T12:45:38Z",
    "title_canon_sha256": "233045c7255f0c8adb406c0fdd1c6148ba7d6e3a59430d36541638068fdef54f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07616",
    "kind": "arxiv",
    "version": 1
  }
}