Pith Number

pith:NXKU5KSE

pith:2015:NXKU5KSEMP445WMUUWSXRO53LY

not attested not anchored not stored refs pending

An Integrability Theorem for Almost-K\"ahler Structures using J-anti-invariant Two-Forms on Four-Manifolds

Markus Upmeier, Mehdi Lejmi

arxiv:1507.00282 v2 · 2015-07-01 · math.DG · math.CV · 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{NXKU5KSEMP445WMUUWSXRO53LY}

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	2026-05-18T01:34:05.091009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6dd54eaa4463f9ced994a5a578bbbb5e2d0d0084e78d6fcc24cb3081dc0a4693

Aliases

arxiv: 1507.00282 · arxiv_version: 1507.00282v2 · doi: 10.48550/arxiv.1507.00282 · pith_short_12: NXKU5KSEMP44 · pith_short_16: NXKU5KSEMP445WMU · pith_short_8: NXKU5KSE

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/NXKU5KSEMP445WMUUWSXRO53LY \
  | 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: 6dd54eaa4463f9ced994a5a578bbbb5e2d0d0084e78d6fcc24cb3081dc0a4693

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d05a66c5e154bd2b23efc1ad059fe2965391c5330a90f8af10983b4b76462c33",
    "cross_cats_sorted": [
      "math.CV",
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2015-07-01T16:36:58Z",
    "title_canon_sha256": "2bfc7a3def8e68226f8c87849e89bed6618aa98d5db8a8bf407cc86b2625ce6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.00282",
    "kind": "arxiv",
    "version": 2
  }
}