Pith Number

pith:MF25OLSD

pith:2009:MF25OLSDWXPWRGPWMRWK5SWREQ

not attested not anchored not stored refs pending

Twistor geometry and warped product orthogonal complex structures

Jeff Viaclovsky, Lev Borisov, Simon Salamon

arxiv:0905.3662 v1 · 2009-05-22 · 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{MF25OLSDWXPWRGPWMRWK5SWREQ}

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	2026-07-05T00:26:51.676911Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6175d72e43b5df6899f6646caecad12437ae88d36ff73937fef979de4cabfac7

Aliases

arxiv: 0905.3662 · arxiv_version: 0905.3662v1 · doi: 10.48550/arxiv.0905.3662 · pith_short_12: MF25OLSDWXPW · pith_short_16: MF25OLSDWXPWRGPW · pith_short_8: MF25OLSD

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/MF25OLSDWXPWRGPWMRWK5SWREQ \
  | 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: 6175d72e43b5df6899f6646caecad12437ae88d36ff73937fef979de4cabfac7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "265302ccf44654edd87a5c26260b03919c4727c5a5bd6e82de540445b43d4ca9",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-05-22T12:23:39Z",
    "title_canon_sha256": "47b0668ed8eca61e91094dc017816d4dc4c1c0ff9b8d749cb5d5b1da1025e34c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.3662",
    "kind": "arxiv",
    "version": 1
  }
}