Pith Number

pith:CDLAC5G6

pith:2013:CDLAC5G6JHYJKZ47NKAURDZ4NY

not attested not anchored not stored refs pending

Lines generate the Picard groups of certain Fermat surfaces

Alex Degtyarev

arxiv:1305.3073 v3 · 2013-05-14 · 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{CDLAC5G6JHYJKZ47NKAURDZ4NY}

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	2026-05-18T01:05:46.719520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

10d60174de49f095679f6a81488f3c6e3db180069a8b6a8c67aeed7d28fb65a7

Aliases

arxiv: 1305.3073 · arxiv_version: 1305.3073v3 · doi: 10.48550/arxiv.1305.3073 · pith_short_12: CDLAC5G6JHYJ · pith_short_16: CDLAC5G6JHYJKZ47 · pith_short_8: CDLAC5G6

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/CDLAC5G6JHYJKZ47NKAURDZ4NY \
  | 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: 10d60174de49f095679f6a81488f3c6e3db180069a8b6a8c67aeed7d28fb65a7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "091ee69708acadf0b10a850075872dc3ac9bfbfabf08ee7654a0eadf1e9d6719",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-05-14T09:21:15Z",
    "title_canon_sha256": "7b76a87bf1992f4d17016903b7d4b3321627a1905b564eb6283c74800a2f9aa8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.3073",
    "kind": "arxiv",
    "version": 3
  }
}