Pith Number

pith:RQUCFJXX

pith:1997:RQUCFJXXAZE5OURRQ4QIUUJB4J

not attested not anchored not stored refs pending

On fundamental groups of elliptically connected surfaces

K. Oguiso, M. Zaidenberg

arxiv:alg-geom/9704012 v1 · 1997-04-11 · alg-geom · 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{RQUCFJXXAZE5OURRQ4QIUUJB4J}

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	2026-05-18T01:07:47.063334Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c2822a6f70649d7523187208a5121e2555c406c913462370e58ea9c8e9ff492

Aliases

arxiv: alg-geom/9704012 · arxiv_version: alg-geom/9704012v1 · doi: 10.48550/arxiv.alg-geom/9704012 · pith_short_12: RQUCFJXXAZE5 · pith_short_16: RQUCFJXXAZE5OURR · pith_short_8: RQUCFJXX

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/RQUCFJXXAZE5OURRQ4QIUUJB4J \
  | 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: 8c2822a6f70649d7523187208a5121e2555c406c913462370e58ea9c8e9ff492

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89a3a02612fde219b53bc6a3b352d49df8222560974c4ae4f6da46b08b8c834f",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "alg-geom",
    "submitted_at": "1997-04-11T20:17:46Z",
    "title_canon_sha256": "94bc5575255da926bd3f645cd0325f359f29ddc7f139530c60bd1316472ff8e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "alg-geom/9704012",
    "kind": "arxiv",
    "version": 1
  }
}