Pith Number

pith:EHZX24LA

pith:2011:EHZX24LAPALD72GE5LL3PZYBON

not attested not anchored not stored refs pending

Regular algebraic surfaces isogenous to a higher product constructed from group representations using projective planes

Alina Vdovina, Nathan Barker, Nigel Boston, Norbert Peyerimhoff

arxiv:1109.6053 v1 · 2011-09-27 · math.GR · math.AG

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	2026-05-18T04:12:09.845499Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21f37d716078163fe8c4ead7b7e701737a923b5ccb7aa5bd927e107b481117ae

Aliases

arxiv: 1109.6053 · arxiv_version: 1109.6053v1 · doi: 10.48550/arxiv.1109.6053 · pith_short_12: EHZX24LAPALD · pith_short_16: EHZX24LAPALD72GE · pith_short_8: EHZX24LA

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/EHZX24LAPALD72GE5LL3PZYBON \
  | 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: 21f37d716078163fe8c4ead7b7e701737a923b5ccb7aa5bd927e107b481117ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb0b08c8862883cef09ac2efca012b312d83201a4f46d31b042ee18d2e4c90e3",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2011-09-27T22:06:25Z",
    "title_canon_sha256": "a028300ed114c31f3f78207adfd4843beadf44052cb56e67295946b06302a48f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6053",
    "kind": "arxiv",
    "version": 1
  }
}