Pith Number

pith:S4E6ZETY

pith:2013:S4E6ZETYMYKQAX55OO5Y66MR2U

not attested not anchored not stored refs pending

Group classification of variable coefficient quasilinear reaction-diffusion equations

Alexander Zhalij, Olena Vaneeva

arxiv:1302.4915 v1 · 2013-02-20 · nlin.SI · math-ph · math.AP · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S4E6ZETYMYKQAX55OO5Y66MR2U}

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	2026-05-18T03:04:38.067916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9709ec92786615005fbd73bb8f7991d52cfe888a75cee231d5b2b425e57dfea5

Aliases

arxiv: 1302.4915 · arxiv_version: 1302.4915v1 · doi: 10.48550/arxiv.1302.4915 · pith_short_12: S4E6ZETYMYKQ · pith_short_16: S4E6ZETYMYKQAX55 · pith_short_8: S4E6ZETY

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/S4E6ZETYMYKQAX55OO5Y66MR2U \
  | 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: 9709ec92786615005fbd73bb8f7991d52cfe888a75cee231d5b2b425e57dfea5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7d02f2a08da03a1df344620c39c42fab211f548ea597723dd9da737a99e8f20",
    "cross_cats_sorted": [
      "math-ph",
      "math.AP",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2013-02-20T14:34:10Z",
    "title_canon_sha256": "4d5293de1c24412cfc6b461f0804cc46c4197e9f70d423a4347a1bf2a58c5191"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.4915",
    "kind": "arxiv",
    "version": 1
  }
}