Pith Number

pith:EOQDGE2L

pith:2009:EOQDGE2L3PDF4PNL47MNAJ7HGX

not attested not anchored not stored refs pending

Rigidity theorems on hemispheres in non-positive space forms

Damin Wu, Lan-Hsuan Huang

arxiv:0907.5549 v2 · 2009-07-31 · 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{EOQDGE2L3PDF4PNL47MNAJ7HGX}

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	2026-05-18T04:39:16.878098Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23a033134bdbc65e3dabe7d8d027e735c66816b688e81b2f58648d57deb7d53d

Aliases

arxiv: 0907.5549 · arxiv_version: 0907.5549v2 · doi: 10.48550/arxiv.0907.5549 · pith_short_12: EOQDGE2L3PDF · pith_short_16: EOQDGE2L3PDF4PNL · pith_short_8: EOQDGE2L

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/EOQDGE2L3PDF4PNL47MNAJ7HGX \
  | 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: 23a033134bdbc65e3dabe7d8d027e735c66816b688e81b2f58648d57deb7d53d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7dc59ea9d9a04f948cd4782f89a9a0beb1d289c313af77113c81f74501d0c4fa",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-07-31T15:10:55Z",
    "title_canon_sha256": "26dd576e09b1cafac598515d6924d6e75865bfc111826968b345007242da9187"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.5549",
    "kind": "arxiv",
    "version": 2
  }
}