Pith Number

pith:EGTK5BB4

pith:2008:EGTK5BB4YGW2K2O6UY5EMLNJJO

not attested not anchored not stored refs pending

On the isolated singularities of the solutions of the Gaussian curvature equation for nonnegative curvature

Daniela Kraus, Oliver Roth

arxiv:0804.3855 v2 · 2008-04-24 · math.AP · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EGTK5BB4YGW2K2O6UY5EMLNJJO}

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	2026-05-18T02:15:53.398510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21a6ae843cc1ada569dea63a462da94bab868549ce27e0e70c8813f9156eacaa

Aliases

arxiv: 0804.3855 · arxiv_version: 0804.3855v2 · doi: 10.48550/arxiv.0804.3855 · pith_short_12: EGTK5BB4YGW2 · pith_short_16: EGTK5BB4YGW2K2O6 · pith_short_8: EGTK5BB4

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/EGTK5BB4YGW2K2O6UY5EMLNJJO \
  | 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: 21a6ae843cc1ada569dea63a462da94bab868549ce27e0e70c8813f9156eacaa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18fa1cdf6e18000b2621af76eb5b348f67db29f02a8978c7b27aaae63035d888",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2008-04-24T07:13:41Z",
    "title_canon_sha256": "f773935210cf9b94b6bf2406ea74c3e66c67ff5147daa7d4bb71cc0833aee74c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3855",
    "kind": "arxiv",
    "version": 2
  }
}