Pith Number

pith:QEJFCQCV

pith:2013:QEJFCQCVYRF5YKQOQQL36Q5GJL

not attested not anchored not stored refs pending

Cyclic covers and toroidal embeddings

Florin Ambro

arxiv:1310.3951 v2 · 2013-10-15 · math.AG · math.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QEJFCQCVYRF5YKQOQQL36Q5GJL}

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	2026-05-18T01:30:43.456303Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8112514055c44bdc2a0e8417bf43a64af0de9501def661a483aa8ff79081b63c

Aliases

arxiv: 1310.3951 · arxiv_version: 1310.3951v2 · doi: 10.48550/arxiv.1310.3951 · pith_short_12: QEJFCQCVYRF5 · pith_short_16: QEJFCQCVYRF5YKQO · pith_short_8: QEJFCQCV

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/QEJFCQCVYRF5YKQOQQL36Q5GJL \
  | 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: 8112514055c44bdc2a0e8417bf43a64af0de9501def661a483aa8ff79081b63c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9fab082800faae53a2da3185a0523a2152d8d560cd4a78a28c261b048e26f73",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-10-15T08:19:10Z",
    "title_canon_sha256": "3409e4b0f2d22deabfcad4b3a56208fc9a68e810b22fe84c0aa3fbfdb336d9e0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.3951",
    "kind": "arxiv",
    "version": 2
  }
}