Pith Number

pith:P4VVRRFW

pith:2018:P4VVRRFWJHZUNSYNL3WZE54QHW

not attested not anchored not stored refs pending

A characterization of some Fano 4-folds through conic fibrations

Eleonora Anna Romano, Pedro Montero

arxiv:1803.09129 v2 · 2018-03-24 · 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{P4VVRRFWJHZUNSYNL3WZE54QHW}

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.

Cited by

1 paper in Pith

A note on flatness of some fiber type contractions

Receipt and verification

First computed	2026-05-17T23:42:30.782545Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f2b58c4b649f346cb0d5eed9277903d81599e3c6aae4dd705e3585e24fc47cc

Aliases

arxiv: 1803.09129 · arxiv_version: 1803.09129v2 · doi: 10.48550/arxiv.1803.09129 · pith_short_12: P4VVRRFWJHZU · pith_short_16: P4VVRRFWJHZUNSYN · pith_short_8: P4VVRRFW

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/P4VVRRFWJHZUNSYNL3WZE54QHW \
  | 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: 7f2b58c4b649f346cb0d5eed9277903d81599e3c6aae4dd705e3585e24fc47cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "229a5fc4b406edc156c37593c47dab02dbf8fb095b9042694bf4eb3bf79ceb4e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-03-24T15:46:48Z",
    "title_canon_sha256": "d38bf6d0168c5f6b5942179568860b11067ed83ea26f84767547c190ec709413"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.09129",
    "kind": "arxiv",
    "version": 2
  }
}