Pith Number

pith:7UUOYGG5

pith:2010:7UUOYGG5PYNJXILEKFV472KLVK

not attested not anchored not stored refs pending

Some Exceptional Beauville Structures

Ben Fairbairn

arxiv:1007.5050 v4 · 2010-07-28 · math.GR · math.DG

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

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	2026-05-18T04:28:36.525365Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd28ec18dd7e1a9ba164516bcfe94baaacaa0e142e9852d832e4a9455f4607ab

Aliases

arxiv: 1007.5050 · arxiv_version: 1007.5050v4 · doi: 10.48550/arxiv.1007.5050 · pith_short_12: 7UUOYGG5PYNJ · pith_short_16: 7UUOYGG5PYNJXILE · pith_short_8: 7UUOYGG5

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/7UUOYGG5PYNJXILEKFV472KLVK \
  | 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: fd28ec18dd7e1a9ba164516bcfe94baaacaa0e142e9852d832e4a9455f4607ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a1cd587138cc2f334d0f6fe85e193ce9d69c1147596da997e8d84373732bd1b",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2010-07-28T19:21:46Z",
    "title_canon_sha256": "713fe07c7ae79dce058a697d6824a597cfcd425af6c1acec391238f354ab5bc8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.5050",
    "kind": "arxiv",
    "version": 4
  }
}