Pith Number

pith:CKCVOW4J

pith:2013:CKCVOW4JR3UVPAPQFB5LUJJFDI

not attested not anchored not stored refs pending

On the fundamental groups of non-generic $\mathbb{R}$-join-type curves

Christophe Eyral, Mutsuo Oka

arxiv:1307.4837 v1 · 2013-07-18 · 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{CKCVOW4JR3UVPAPQFB5LUJJFDI}

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	2026-05-18T03:18:07.454088Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1285575b898ee95781f0287aba25251a003864c45ac4dbccbbba0937e0e96ca4

Aliases

arxiv: 1307.4837 · arxiv_version: 1307.4837v1 · doi: 10.48550/arxiv.1307.4837 · pith_short_12: CKCVOW4JR3UV · pith_short_16: CKCVOW4JR3UVPAPQ · pith_short_8: CKCVOW4J

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/CKCVOW4JR3UVPAPQFB5LUJJFDI \
  | 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: 1285575b898ee95781f0287aba25251a003864c45ac4dbccbbba0937e0e96ca4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "996495bb2ddfa7fb65b45128e85b83e0b884d2ec96cdd97081dfb0e33191a6d2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-07-18T06:11:48Z",
    "title_canon_sha256": "0cfc2c9b18274479d55bd4a67714b7ba948affa5113727148437f5cd28056599"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.4837",
    "kind": "arxiv",
    "version": 1
  }
}