Pith Number

pith:QAGC2GNQ

pith:2021:QAGC2GNQFFAOVLMUP4R4PXDBAS

not attested not anchored not stored refs pending

On uniqueness and nonuniqueness of ancient ovals

Robert Haslhofer, Wenkui Du

arxiv:2105.13830 v2 · 2021-05-28 · math.DG · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QAGC2GNQFFAOVLMUP4R4PXDBAS}

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	2026-07-05T04:03:46.797169Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

800c2d19b02940eaad947f23c7dc6104ab1f49627e263da82b9548f05a30add5

Aliases

arxiv: 2105.13830 · arxiv_version: 2105.13830v2 · doi: 10.48550/arxiv.2105.13830 · pith_short_12: QAGC2GNQFFAO · pith_short_16: QAGC2GNQFFAOVLMU · pith_short_8: QAGC2GNQ

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/QAGC2GNQFFAOVLMUP4R4PXDBAS \
  | 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: 800c2d19b02940eaad947f23c7dc6104ab1f49627e263da82b9548f05a30add5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f848a235f21b641018f197a58733b07f3b8528d23ab24413628819fb4aab008b",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2021-05-28T13:45:29Z",
    "title_canon_sha256": "129def6b36a4ed9d71f43fcf5dfffe44df8dae06b6f65a5d328da66d5db87ad5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2105.13830",
    "kind": "arxiv",
    "version": 2
  }
}