Pith Number

pith:NSYHAQVB

pith:2011:NSYHAQVBXDDF6K5O2L6WHCTCMZ

not attested not anchored not stored refs pending

The intuitive definition of Du Bois singularities

S\'andor J Kov\'acs

arxiv:1109.5569 v2 · 2011-09-26 · 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	2026-05-18T04:11:51.098075Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6cb07042a1b8c65f2baed2fd638a62664636f4cd4526976b5bfafbb9f988fe84

Aliases

arxiv: 1109.5569 · arxiv_version: 1109.5569v2 · doi: 10.48550/arxiv.1109.5569 · pith_short_12: NSYHAQVBXDDF · pith_short_16: NSYHAQVBXDDF6K5O · pith_short_8: NSYHAQVB

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/NSYHAQVBXDDF6K5O2L6WHCTCMZ \
  | 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: 6cb07042a1b8c65f2baed2fd638a62664636f4cd4526976b5bfafbb9f988fe84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52fd8c54ff6ca325a8725e8d5642e0c8a8584eaa5b2dc588726dc78d9102dfda",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2011-09-26T13:52:34Z",
    "title_canon_sha256": "9076a2725c66f0baa013479aee1dfd67cb4b846c6c463ee6d4468a625f307ce2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5569",
    "kind": "arxiv",
    "version": 2
  }
}