Pith Number

pith:HJQXZIWZ

pith:2009:HJQXZIWZXEWQF5BBQHQ6DFD3S5

not attested not anchored not stored refs pending

Two-coverings of Jacobians of curves of genus two

Damiano Testa, E. Victor Flynn, Ronald van Luijk

arxiv:0905.1242 v1 · 2009-05-08 · math.NT · 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{HJQXZIWZXEWQF5BBQHQ6DFD3S5}

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	2026-05-18T02:58:03.241722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a617ca2d9b92d02f42181e1e1947b9757a9b0607abfdff1a782f59d2f1f75f3

Aliases

arxiv: 0905.1242 · arxiv_version: 0905.1242v1 · doi: 10.48550/arxiv.0905.1242 · pith_short_12: HJQXZIWZXEWQ · pith_short_16: HJQXZIWZXEWQF5BB · pith_short_8: HJQXZIWZ

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/HJQXZIWZXEWQF5BBQHQ6DFD3S5 \
  | 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: 3a617ca2d9b92d02f42181e1e1947b9757a9b0607abfdff1a782f59d2f1f75f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8b6a0d85786d68712f8cedbefc3984a9d18033cc64969a423193b96f9de75aad",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2009-05-08T12:30:57Z",
    "title_canon_sha256": "35b8c1947855f0e12dafc04bac098c5be2c4d402ed0cca2d646215bb5f2eea11"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.1242",
    "kind": "arxiv",
    "version": 1
  }
}