Pith Number

pith:IRJ7W3VV

pith:2019:IRJ7W3VVB4TVYSISOK4R5FMFHG

not attested not anchored not stored refs pending

Differential invariants for a class of diffusion equations

Alexander Bihlo, Elsa Dos Santos Cardoso-Bihlo, Roman O. Popovych

arxiv:1909.00477 v1 · 2019-09-01 · 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{IRJ7W3VVB4TVYSISOK4R5FMFHG}

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	2026-07-05T00:23:23.883474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4453fb6eb50f275c491272b91e9585398959f0683ef9ae3450193b2f6c8d081d

Aliases

arxiv: 1909.00477 · arxiv_version: 1909.00477v1 · doi: 10.48550/arxiv.1909.00477 · pith_short_12: IRJ7W3VVB4TV · pith_short_16: IRJ7W3VVB4TVYSIS · pith_short_8: IRJ7W3VV

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/IRJ7W3VVB4TVYSISOK4R5FMFHG \
  | 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: 4453fb6eb50f275c491272b91e9585398959f0683ef9ae3450193b2f6c8d081d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "608bdd2d9a87ee9b79e78a41a8b09d88fbd8211861097ec5c89947f97e65c4fa",
    "cross_cats_sorted": [
      "math.AP",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2019-09-01T21:41:02Z",
    "title_canon_sha256": "31cf5bdc4795f66ffe90cd4e9e40238ce79a46e80b23b468636bc07484606365"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.00477",
    "kind": "arxiv",
    "version": 1
  }
}