Pith Number

pith:O2UBR6TI

pith:2009:O2UBR6TIUV52JEPJ7IU4MS3GAX

not attested not anchored not stored refs pending

A symmetry classification for a class of (2+1)-nonlinear wave equation

Ali Mahdipour-Shirayeh, Mehdi Nadjafikhah, Rohollah Bakhshandeh-Chamazkoti

arxiv:0907.4858 v2 · 2009-07-28 · 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{O2UBR6TIUV52JEPJ7IU4MS3GAX}

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	2026-05-18T04:15:36.292235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76a818fa68a57ba491e9fa29c64b6605cb1f1e709e088f1de7140304431f1aba

Aliases

arxiv: 0907.4858 · arxiv_version: 0907.4858v2 · doi: 10.48550/arxiv.0907.4858 · pith_short_12: O2UBR6TIUV52 · pith_short_16: O2UBR6TIUV52JEPJ · pith_short_8: O2UBR6TI

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/O2UBR6TIUV52JEPJ7IU4MS3GAX \
  | 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: 76a818fa68a57ba491e9fa29c64b6605cb1f1e709e088f1de7140304431f1aba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b7e58ada7b809783a221d5fa0a118b35f66c7fc3498cce028b569bff89cd718",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-07-28T08:23:18Z",
    "title_canon_sha256": "c1a0ebf99386d58f57f690f36def4fb5f85b0075fc1a134562e98d86985ab271"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4858",
    "kind": "arxiv",
    "version": 2
  }
}