Pith Number

pith:7U6LVJYG

pith:2009:7U6LVJYGEB6KY7MFFNBA2422OZ

not attested not anchored not stored refs pending

The Calabi-Yau equation, symplectic forms and almost complex structures

Ben Weinkove, Valentino Tosatti

arxiv:0901.1501 v1 · 2009-01-12 · math.DG · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7U6LVJYGEB6KY7MFFNBA2422OZ}

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	2026-05-18T04:18:53.467183Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd3cbaa706207cac7d852b420d735a7640dce1e5e3dab2f9cdf6faf426d46c6d

Aliases

arxiv: 0901.1501 · arxiv_version: 0901.1501v1 · doi: 10.48550/arxiv.0901.1501 · pith_short_12: 7U6LVJYGEB6K · pith_short_16: 7U6LVJYGEB6KY7MF · pith_short_8: 7U6LVJYG

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/7U6LVJYGEB6KY7MFFNBA2422OZ \
  | 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: fd3cbaa706207cac7d852b420d735a7640dce1e5e3dab2f9cdf6faf426d46c6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d4c8839958bcd3878d8ec4cccb3bc9b33a9c3bfd663871889cdce51151b8a5b",
    "cross_cats_sorted": [
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-01-12T03:55:23Z",
    "title_canon_sha256": "f8d868184d7a46cc8c814c1da20d0e83fc96bb0ed1ae36a71e0ac6e2738baea0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.1501",
    "kind": "arxiv",
    "version": 1
  }
}