Pith Number

pith:KWOW4GQD

pith:2013:KWOW4GQDK72IN5TPZPMMTX2TCI

not attested not anchored not stored refs pending

Summary of progress on the Blaschke conjecture

Benjamin McKay (University College Cork)

arxiv:1309.1326 v5 · 2013-09-05 · math.DG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KWOW4GQDK72IN5TPZPMMTX2TCI}

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	2026-07-05T00:18:02.791446Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

559d6e1a0357f486f66fcbd8c9df531215a4891ed7a9f96365cdaac76f697daa

Aliases

arxiv: 1309.1326 · arxiv_version: 1309.1326v5 · doi: 10.48550/arxiv.1309.1326 · pith_short_12: KWOW4GQDK72I · pith_short_16: KWOW4GQDK72IN5TP · pith_short_8: KWOW4GQD

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/KWOW4GQDK72IN5TPZPMMTX2TCI \
  | 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: 559d6e1a0357f486f66fcbd8c9df531215a4891ed7a9f96365cdaac76f697daa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96e5ec2cf8402308e807376ad19dddce838f9bdbaecf73872b3961ac8b5d0652",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2013-09-05T12:15:15Z",
    "title_canon_sha256": "597be917c84b10a4fe023b8c9f0b44340b7020f20aad92bc2f9757e6e6d3f317"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.1326",
    "kind": "arxiv",
    "version": 5
  }
}