Pith Number

pith:D5H6PQEZ

pith:2019:D5H6PQEZ2RXHWA4UN6HEZNUER4

not attested not anchored not stored refs pending

Alpha invariants of birationally bi-rigid Fano 3-folds I

In-Kyun Kim, Joonyeong Won, Takuzo Okada

arxiv:1903.07074 v1 · 2019-03-17 · 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{D5H6PQEZ2RXHWA4UN6HEZNUER4}

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	2026-05-17T23:51:04.332493Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f4fe7c099d46e7b03946f8e4cb6848f30651327fcedac962bf749f9f935001b

Aliases

arxiv: 1903.07074 · arxiv_version: 1903.07074v1 · doi: 10.48550/arxiv.1903.07074 · pith_short_12: D5H6PQEZ2RXH · pith_short_16: D5H6PQEZ2RXHWA4U · pith_short_8: D5H6PQEZ

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/D5H6PQEZ2RXHWA4UN6HEZNUER4 \
  | 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: 1f4fe7c099d46e7b03946f8e4cb6848f30651327fcedac962bf749f9f935001b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2dbdc944c42026fdf752c74710e6210625ce3900a5bdc7f15f7c51413e8d03fb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2019-03-17T12:41:53Z",
    "title_canon_sha256": "e51939c370f500c2e546792c37d7ce662cd4eb80666391839a191adc63e9f24b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07074",
    "kind": "arxiv",
    "version": 1
  }
}