Pith Number

pith:OCQYHS6E

pith:2006:OCQYHS6ETHGCT4HN5ETD5BGEP6

not attested not anchored not stored refs pending

Extrinsic radius pinching for hypersurfaces of space forms

Julien Roth

arxiv:math/0603494 v1 · 2006-03-21 · 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{OCQYHS6ETHGCT4HN5ETD5BGEP6}

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	2026-05-18T00:50:13.919887Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70a183cbc499cc29f0ede9263e84c47f9b05adf84c72f13ebe1a3c1dc33262ff

Aliases

arxiv: math/0603494 · arxiv_version: math/0603494v1 · doi: 10.48550/arxiv.math/0603494 · pith_short_12: OCQYHS6ETHGC · pith_short_16: OCQYHS6ETHGCT4HN · pith_short_8: OCQYHS6E

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/OCQYHS6ETHGCT4HN5ETD5BGEP6 \
  | 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: 70a183cbc499cc29f0ede9263e84c47f9b05adf84c72f13ebe1a3c1dc33262ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7662660bf33213e0bfda0d51302f59ae07e9d215373a5de17eded425085eed29",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "math.DG",
    "submitted_at": "2006-03-21T09:19:37Z",
    "title_canon_sha256": "abef1ee35b8850427579414367aa0fec1200af95d0783f4d6629e571303caa6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0603494",
    "kind": "arxiv",
    "version": 1
  }
}