Pith Number

pith:BD7EX3OA

pith:2025:BD7EX3OA6UCVT5AX74PJUMWNWQ

not attested not anchored not stored refs pending

On Conway's Numbers and Games, the Von Neumann Universe, and Pure Set Theory

Wolfgang Bertram (IECL)

arxiv:2501.04412 v2 · 2025-01-08 · math.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{BD7EX3OA6UCVT5AX74PJUMWNWQ}

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	2026-07-05T10:18:47.976803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08fe4bedc0f50559f417ff1e9a32cdb40cd29a637960bb4c3adb2d38931195ed

Aliases

arxiv: 2501.04412 · arxiv_version: 2501.04412v2 · doi: 10.48550/arxiv.2501.04412 · pith_short_12: BD7EX3OA6UCV · pith_short_16: BD7EX3OA6UCVT5AX · pith_short_8: BD7EX3OA

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/BD7EX3OA6UCVT5AX74PJUMWNWQ \
  | 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: 08fe4bedc0f50559f417ff1e9a32cdb40cd29a637960bb4c3adb2d38931195ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28cc2100322bf75be5ca314edc34bf81de517e18cec62ef2e43c4e0189949c94",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2025-01-08T10:57:30Z",
    "title_canon_sha256": "0f3d574c1d57becff12e373e3f19c17dea763f8e1856d8a59928b11dba16f2bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.04412",
    "kind": "arxiv",
    "version": 2
  }
}