Pith Number

pith:VAPUYL6T

pith:2013:VAPUYL6TKU37OFKHV4TMWTJ3JY

not attested not anchored not stored refs pending

Doubling construction of Calabi-Yau threefolds

Mamoru Doi, Naoto Yotsutani

arxiv:1305.0074 v3 · 2013-05-01 · math.DG · 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{VAPUYL6TKU37OFKHV4TMWTJ3JY}

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	2026-05-18T02:37:44.875863Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a81f4c2fd35537f71547af26cb4d3b4e0a0770586b760f63356517a0db1cd78d

Aliases

arxiv: 1305.0074 · arxiv_version: 1305.0074v3 · doi: 10.48550/arxiv.1305.0074 · pith_short_12: VAPUYL6TKU37 · pith_short_16: VAPUYL6TKU37OFKH · pith_short_8: VAPUYL6T

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/VAPUYL6TKU37OFKHV4TMWTJ3JY \
  | 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: a81f4c2fd35537f71547af26cb4d3b4e0a0770586b760f63356517a0db1cd78d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ccb5b3714855ae2bdd2720ecd31b2856a5178dd3932fff5034bd959671e0d72f",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-05-01T03:02:34Z",
    "title_canon_sha256": "95d88f18b703a336b5cd0baa66ffebe86ec3da17eafb5bf0fd1513097ff688d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.0074",
    "kind": "arxiv",
    "version": 3
  }
}