Pith Number

pith:EA7UGH2T

pith:2015:EA7UGH2T7IF2RY5ZR6L5VFMVZQ

not attested not anchored not stored refs pending

Corrado Segre and nodal cubic threefolds

Igor Dolgachev

arxiv:1501.06432 v1 · 2015-01-26 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EA7UGH2T7IF2RY5ZR6L5VFMVZQ}

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	2026-05-18T02:28:41.475881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

203f431f53fa0ba8e3b98f97da9595cc3dd6a41791e61dde1875389b9d5f3176

Aliases

arxiv: 1501.06432 · arxiv_version: 1501.06432v1 · doi: 10.48550/arxiv.1501.06432 · pith_short_12: EA7UGH2T7IF2 · pith_short_16: EA7UGH2T7IF2RY5Z · pith_short_8: EA7UGH2T

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/EA7UGH2T7IF2RY5ZR6L5VFMVZQ \
  | 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: 203f431f53fa0ba8e3b98f97da9595cc3dd6a41791e61dde1875389b9d5f3176

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eaf508d8ab7d94340ebb197b67db7c57db298add59e7e846d4019e3751ccadbb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2015-01-26T15:06:55Z",
    "title_canon_sha256": "69a03f6077178e38cc59249ef9bdb1226ff571e46aebed7df299aa535aa3c7aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.06432",
    "kind": "arxiv",
    "version": 1
  }
}