Pith Number

pith:OBY6JQIU

pith:2010:OBY6JQIUZPUUYMVL6VLEYSPG6T

not attested not anchored not stored refs pending

Secant varieties of P^2 x P^n embedded by O(1,2)

Daniel Erman, Dustin Cartwright, Luke Oeding

arxiv:1009.1199 v1 · 2010-09-07 · 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{OBY6JQIUZPUUYMVL6VLEYSPG6T}

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	2026-05-18T00:13:14.234993Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7071e4c114cbe94c32abf5564c49e6f4d077883d48e6a96a46b405c35d37bbd3

Aliases

arxiv: 1009.1199 · arxiv_version: 1009.1199v1 · doi: 10.48550/arxiv.1009.1199 · pith_short_12: OBY6JQIUZPUU · pith_short_16: OBY6JQIUZPUUYMVL · pith_short_8: OBY6JQIU

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/OBY6JQIUZPUUYMVL6VLEYSPG6T \
  | 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: 7071e4c114cbe94c32abf5564c49e6f4d077883d48e6a96a46b405c35d37bbd3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a4e575ce500c687a368e7727b7d6fb58229521c8ea259abb045593da5678a93",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2010-09-07T06:09:26Z",
    "title_canon_sha256": "c287405cba9913bf87f82313238ed08a046d96a17bac5a7f86cfea011b4eb038"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.1199",
    "kind": "arxiv",
    "version": 1
  }
}