Pith Number

pith:PCHGRCA5

pith:1994:PCHGRCA5W3MTM7PSBLVCUWCZ5N

not attested not anchored not stored refs pending

The Tangent Space at a Special Symplectic Instanton Bundle on $P_{2n+1}$

Giorgio Ottaviani, G\"unther Trautmann

arxiv:alg-geom/9402005 v2 · 1994-02-07 · alg-geom · 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{PCHGRCA5W3MTM7PSBLVCUWCZ5N}

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	2026-05-18T01:09:21.800777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

788e68881db6d9367df20aea2a5859eb5a98bdcc85ae9ee038961007fc5c852a

Aliases

arxiv: alg-geom/9402005 · arxiv_version: alg-geom/9402005v2 · doi: 10.48550/arxiv.alg-geom/9402005 · pith_short_12: PCHGRCA5W3MT · pith_short_16: PCHGRCA5W3MTM7PS · pith_short_8: PCHGRCA5

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/PCHGRCA5W3MTM7PSBLVCUWCZ5N \
  | 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: 788e68881db6d9367df20aea2a5859eb5a98bdcc85ae9ee038961007fc5c852a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40a77b20d8cc087ec7fa6f6fd02ffe33183fdc7a67db978fb746019aaf6073d2",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "alg-geom",
    "submitted_at": "1994-02-07T18:53:00Z",
    "title_canon_sha256": "9e5ada3b9f263edbbe63367b53fac29fd038f337db0b92fac942bd21e4ccc425"
  },
  "schema_version": "1.0",
  "source": {
    "id": "alg-geom/9402005",
    "kind": "arxiv",
    "version": 2
  }
}