Pith Number

pith:A7CHDUU2

pith:2021:A7CHDUU2JW2W6U4HTDPBYEQHST

not attested not anchored not stored refs pending

An example of non-K\"ahler Calabi-Yau fourfold

Nam-Hoon Lee

arxiv:2102.12656 v2 · 2021-02-25 · 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{A7CHDUU2JW2W6U4HTDPBYEQHST}

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.

Cited by

1 paper in Pith

Smoothing toroidal crossing spaces

Receipt and verification

First computed	2026-07-05T03:44:52.372995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

07c471d29a4db56f538798de1c120794c763580f053791862050c0aaa27240b8

Aliases

arxiv: 2102.12656 · arxiv_version: 2102.12656v2 · doi: 10.48550/arxiv.2102.12656 · pith_short_12: A7CHDUU2JW2W · pith_short_16: A7CHDUU2JW2W6U4H · pith_short_8: A7CHDUU2

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/A7CHDUU2JW2W6U4HTDPBYEQHST \
  | 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: 07c471d29a4db56f538798de1c120794c763580f053791862050c0aaa27240b8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "315d888ce7eb7947cbb1e865c66ba487f371ac4c17e898880a0469e3631c3498",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2021-02-25T03:21:10Z",
    "title_canon_sha256": "49be8f2ddf5c7ca55e8177b2d078d8a26852a49c5915e149b969fb5d03ee51a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.12656",
    "kind": "arxiv",
    "version": 2
  }
}