Pith Number

pith:UQRZFZQ3

pith:2008:UQRZFZQ3GKLDZIMAKOCG2ZKO7O

not attested not anchored not stored refs pending

Secant varieties of Segre-Veronese varieties P^m x P^n embedded by O(1,2)

Hirotachi Abo, Maria Chiara Brambilla

arxiv:0809.4837 v3 · 2008-09-28 · 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{UQRZFZQ3GKLDZIMAKOCG2ZKO7O}

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	2026-05-18T04:03:07.652004Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a42392e61b32963ca18053846d654efb940d7e8eef8ed7ee2fcdbf20da7d9aab

Aliases

arxiv: 0809.4837 · arxiv_version: 0809.4837v3 · doi: 10.48550/arxiv.0809.4837 · pith_short_12: UQRZFZQ3GKLD · pith_short_16: UQRZFZQ3GKLDZIMA · pith_short_8: UQRZFZQ3

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/UQRZFZQ3GKLDZIMAKOCG2ZKO7O \
  | 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: a42392e61b32963ca18053846d654efb940d7e8eef8ed7ee2fcdbf20da7d9aab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7b8cc2538dcc0a54529226b9cb27861852573600c9dbce6e938f69dbd3e9873",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-09-28T11:39:57Z",
    "title_canon_sha256": "77252d5409e7656a54ce96fdb0ebbef5b7b91fcf56fcb55eb75baee134a246b2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4837",
    "kind": "arxiv",
    "version": 3
  }
}