Pith Number

pith:KZC2DJ4L

pith:2009:KZC2DJ4LYWROSXMZ5AJRXVUNXZ

not attested not anchored not stored refs pending

Preliminarily group classification of a class of 2D nonlinear heat equations

Mehdi Nadjafikhah, Rouholah Bakhshandeh Chamazkoti

arxiv:0908.3760 v1 · 2009-08-26 · 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{KZC2DJ4LYWROSXMZ5AJRXVUNXZ}

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	2026-05-18T02:52:48.039160Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5645a1a78bc5a2e95d99e8131bd68dbe66949b3ff04627bca7fdf571eebdb2f4

Aliases

arxiv: 0908.3760 · arxiv_version: 0908.3760v1 · doi: 10.48550/arxiv.0908.3760 · pith_short_12: KZC2DJ4LYWRO · pith_short_16: KZC2DJ4LYWROSXMZ · pith_short_8: KZC2DJ4L

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/KZC2DJ4LYWROSXMZ5AJRXVUNXZ \
  | 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: 5645a1a78bc5a2e95d99e8131bd68dbe66949b3ff04627bca7fdf571eebdb2f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6123dd3f6ed0a4265059980db41a3791dbdbd99228a73bc9a2741b8c98f7145b",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-08-26T08:20:19Z",
    "title_canon_sha256": "263a4014be61d12538f747e6fdd85eaabd11a041ca8e0c6fd92ae4bf56678ff6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3760",
    "kind": "arxiv",
    "version": 1
  }
}