Pith Number

pith:UTEEVVFQ

pith:2013:UTEEVVFQAI3W5SJ74T3V33JP2C

not attested not anchored not stored refs pending

Pseudo-effective and nef cones on spherical varieties

Qifeng Li

arxiv:1311.6791 v1 · 2013-11-26 · 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{UTEEVVFQAI3W5SJ74T3V33JP2C}

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	2026-05-18T03:06:05.800823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4c84ad4b002376ec93fe4f75ded2fd0a5d2ee1708591aa71a8984a26d30f9ed

Aliases

arxiv: 1311.6791 · arxiv_version: 1311.6791v1 · doi: 10.48550/arxiv.1311.6791 · pith_short_12: UTEEVVFQAI3W · pith_short_16: UTEEVVFQAI3W5SJ7 · pith_short_8: UTEEVVFQ

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/UTEEVVFQAI3W5SJ74T3V33JP2C \
  | 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: a4c84ad4b002376ec93fe4f75ded2fd0a5d2ee1708591aa71a8984a26d30f9ed

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7cc5f454b64ae6e796d51647484ce54734fe4412ed762dd4678fdfd4b915f4d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2013-11-26T19:54:18Z",
    "title_canon_sha256": "05eca811765074c4fbd390de3211914d2451b23c70d96896453b6c5baaf31654"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.6791",
    "kind": "arxiv",
    "version": 1
  }
}