Pith Number

pith:OKC2PDR7

pith:2004:OKC2PDR7P7OJPKBXZF6XHFQFF6

not attested not anchored not stored refs pending

Hamiltonian 2-forms in Kahler geometry, II Global Classification

Christina W. Tonneson-Friedman, David M. J. Calderbank, Paul Gauduchon, Vestislav Apostolov

arxiv:math/0401320 v2 · 2004-01-23 · math.DG · math.AG · 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{OKC2PDR7P7OJPKBXZF6XHFQFF6}

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

All toric Kahler surfaces with twistor 2-forms

Receipt and verification

First computed	2026-07-04T14:38:11.046601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7285a78e3f7fdc97a837c97d7396052f8de943f89118c76e9228a906d3273c0c

Aliases

arxiv: math/0401320 · arxiv_version: math/0401320v2 · doi: 10.48550/arxiv.math/0401320 · pith_short_12: OKC2PDR7P7OJ · pith_short_16: OKC2PDR7P7OJPKBX · pith_short_8: OKC2PDR7

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/OKC2PDR7P7OJPKBXZF6XHFQFF6 \
  | 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: 7285a78e3f7fdc97a837c97d7396052f8de943f89118c76e9228a906d3273c0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ece9b32fa63c6c956b94d8d83a8910b853e430f0b41cc0251d453c174d73e8a",
    "cross_cats_sorted": [
      "math.AG",
      "math.SG"
    ],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2004-01-23T17:19:51Z",
    "title_canon_sha256": "3128ca52844ed7d354b218abeb5c42495423ccf2cb336e7d23d400259d06deec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0401320",
    "kind": "arxiv",
    "version": 2
  }
}