Pith Number

pith:4P6YPAQD

pith:2016:4P6YPAQDYEGZIMLSZT3YIZVB6Q

not attested not anchored not stored refs pending

On a smooth quartic surface containing 56 lines which is isomorphic as a K3 surface to the Fermat quartic

Ichiro Shimada, Tetsuji Shioda

arxiv:1604.06265 v3 · 2016-04-21 · 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{4P6YPAQDYEGZIMLSZT3YIZVB6Q}

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	2026-05-18T01:06:20.713797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e3fd878203c10d943172ccf78466a1f4068baab5c41f7ff2788be6594783b3f0

Aliases

arxiv: 1604.06265 · arxiv_version: 1604.06265v3 · doi: 10.48550/arxiv.1604.06265 · pith_short_12: 4P6YPAQDYEGZ · pith_short_16: 4P6YPAQDYEGZIMLS · pith_short_8: 4P6YPAQD

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/4P6YPAQDYEGZIMLSZT3YIZVB6Q \
  | 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: e3fd878203c10d943172ccf78466a1f4068baab5c41f7ff2788be6594783b3f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40ddd35d07d96d62668ea170b86d8b701321815f36c11fefe45b7df0c5e9778f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-04-21T11:49:43Z",
    "title_canon_sha256": "cc0ed08c61336722bb76271c4d3207266b2fc30be22605942e2066a64bf71b90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.06265",
    "kind": "arxiv",
    "version": 3
  }
}