Pith Number

pith:63TBIVDR

pith:2011:63TBIVDROQJ4N5HMD3K63QLJ25

not attested not anchored not stored refs pending

Skew-symmetric complex matrices, pure spinors, the twistor space of the conformal $2n$-sphere, and the Fano variety of linear $n$-folds of a non-singular complex quadric hypersurface in $\mathbb{P}^{2n+1}$

Alberto Verjovsky, Elsa Puente

arxiv:1111.3382 v2 · 2011-11-14 · 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{63TBIVDROQJ4N5HMD3K63QLJ25}

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	2026-05-18T03:50:37.501427Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6e61454717413c6f4ec1ed5edc169d74353db41c880055b1d92085e53bf0a11

Aliases

arxiv: 1111.3382 · arxiv_version: 1111.3382v2 · doi: 10.48550/arxiv.1111.3382 · pith_short_12: 63TBIVDROQJ4 · pith_short_16: 63TBIVDROQJ4N5HM · pith_short_8: 63TBIVDR

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/63TBIVDROQJ4N5HMD3K63QLJ25 \
  | 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: f6e61454717413c6f4ec1ed5edc169d74353db41c880055b1d92085e53bf0a11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff57fb0f1119656922b3603129454aec1b1a84291b719f044d195844af521146",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2011-11-14T22:15:55Z",
    "title_canon_sha256": "0f4ca813664698b03f760c2c934af5be2e795cb851a59f156f72c5b399228c00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.3382",
    "kind": "arxiv",
    "version": 2
  }
}