Pith Number

pith:6WXAVU2J

pith:2010:6WXAVU2JHGWV6VFTNP5ONVSVXO

not attested not anchored not stored refs pending

Locally nearly spherical surfaces are almost-positively $c$-curved

Philippe Delano\"e, Yuxin Ge

arxiv:1009.3586 v2 · 2010-09-18 · 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{6WXAVU2JHGWV6VFTNP5ONVSVXO}

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	2026-05-18T03:59:27.629636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5ae0ad34939ad5f54b36bfae6d655bba637b486c2de9bd5df7e2c959d8d7761

Aliases

arxiv: 1009.3586 · arxiv_version: 1009.3586v2 · doi: 10.48550/arxiv.1009.3586 · pith_short_12: 6WXAVU2JHGWV · pith_short_16: 6WXAVU2JHGWV6VFT · pith_short_8: 6WXAVU2J

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/6WXAVU2JHGWV6VFTNP5ONVSVXO \
  | 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: f5ae0ad34939ad5f54b36bfae6d655bba637b486c2de9bd5df7e2c959d8d7761

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f076da9125ea1800aa69e70377dfdc6c161fde51360974ce3bbeecc94bf25922",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2010-09-18T21:35:22Z",
    "title_canon_sha256": "f7d3c35484de00956d0275fcb08e0bb92d300edfe4f69fc178e06d70d69b37ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.3586",
    "kind": "arxiv",
    "version": 2
  }
}