Pith Number

pith:PZO6LB3B

pith:2009:PZO6LB3B7BNFTWZSPUOL7OPW4I

not attested not anchored not stored refs pending

Projective analysis and preliminary group classification of the nonlinear fin equation $u_t=(E(u)u_x)_x + h(x)u$

Ali Mahdipour-Shirayeh, Mehdi Nadjafikhah

arxiv:0908.3752 v1 · 2009-08-26 · 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{PZO6LB3B7BNFTWZSPUOL7OPW4I}

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	2026-05-18T03:38:24.111575Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e5de58761f85a59db327d1cbfb9f6e20b0d700dd5af66b96a0817196e523fe3

Aliases

arxiv: 0908.3752 · arxiv_version: 0908.3752v1 · doi: 10.48550/arxiv.0908.3752 · pith_short_12: PZO6LB3B7BNF · pith_short_16: PZO6LB3B7BNFTWZS · pith_short_8: PZO6LB3B

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/PZO6LB3B7BNFTWZSPUOL7OPW4I \
  | 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: 7e5de58761f85a59db327d1cbfb9f6e20b0d700dd5af66b96a0817196e523fe3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "613b4ac2107ff4388bba4a06ef0bfb2eb1c9e4b7ae8583c6c83fe22071878dc0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-08-26T08:07:41Z",
    "title_canon_sha256": "41a1115381c3c9d66a7061f2800669fc74d193aa6e8e9f5849c85d040f5c2463"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.3752",
    "kind": "arxiv",
    "version": 1
  }
}