Pith Number

pith:4IGS65K4

pith:2017:4IGS65K4BVTSEZDHMBXXSIUWYN

not attested not anchored not stored refs pending

Research announcement: equations of a fake projective plane

JongHae Keum, Lev Borisov

arxiv:1710.04501 v1 · 2017-10-10 · 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{4IGS65K4BVTSEZDHMBXXSIUWYN}

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	2026-05-18T00:33:00.833999Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e20d2f755c0d67226467606f792296c346abee87ca0bc98f74cfd8f14f96169e

Aliases

arxiv: 1710.04501 · arxiv_version: 1710.04501v1 · doi: 10.48550/arxiv.1710.04501 · pith_short_12: 4IGS65K4BVTS · pith_short_16: 4IGS65K4BVTSEZDH · pith_short_8: 4IGS65K4

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/4IGS65K4BVTSEZDHMBXXSIUWYN \
  | 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: e20d2f755c0d67226467606f792296c346abee87ca0bc98f74cfd8f14f96169e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "100cb8359ecb0dc6817abcb33fd2430594c67b69bbfdfaec37e213f058cb93a5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-10-10T17:15:04Z",
    "title_canon_sha256": "f09a854a234fdfaeb60036d0d88aa9adbb390a8b797ad6a04345574d5094dd23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.04501",
    "kind": "arxiv",
    "version": 1
  }
}