Pith Number

pith:EXC6R42F

pith:1997:EXC6R42FIR65RZAP5YOESEVWW4

not attested not anchored not stored refs pending

Prym varieties and the infinite Grassmannian

Francisco J. Plaza Mart\'in

arxiv:alg-geom/9706009 v1 · 1997-06-24 · 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{EXC6R42FIR65RZAP5YOESEVWW4}

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	2026-05-18T01:09:21.766892Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25c5e8f345447dd8e40fee1c4912b6b70cd4311613bc748dcaa8660012f9541e

Aliases

arxiv: alg-geom/9706009 · arxiv_version: alg-geom/9706009v1 · doi: 10.48550/arxiv.alg-geom/9706009 · pith_short_12: EXC6R42FIR65 · pith_short_16: EXC6R42FIR65RZAP · pith_short_8: EXC6R42F

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/EXC6R42FIR65RZAP5YOESEVWW4 \
  | 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: 25c5e8f345447dd8e40fee1c4912b6b70cd4311613bc748dcaa8660012f9541e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec27cfd5343c17ee171608759cea1d80f3f2d80c10f07b1b27a1082dfcf92d04",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "alg-geom",
    "submitted_at": "1997-06-24T09:33:12Z",
    "title_canon_sha256": "e7c7e525a1cb076cfd183594b1216419ff36f0f97e0b6098890adb2753f30eca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "alg-geom/9706009",
    "kind": "arxiv",
    "version": 1
  }
}