Pith Number

pith:WSYSZYAM

pith:2018:WSYSZYAMO7ZZKK2UTLCHEUSH4H

not attested not anchored not stored refs pending

Porous medium equation with a blow-up nonlinearity and a non-decreasing constraint

Goro Akagi, Stefano Melchionna

arxiv:1802.09570 v1 · 2018-02-26 · 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{WSYSZYAMO7ZZKK2UTLCHEUSH4H}

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	2026-05-18T00:22:30.748008Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4b12ce00c77f3952b549ac4725247e1ed9aab187304d8498178dc49f56baa86

Aliases

arxiv: 1802.09570 · arxiv_version: 1802.09570v1 · doi: 10.48550/arxiv.1802.09570 · pith_short_12: WSYSZYAMO7ZZ · pith_short_16: WSYSZYAMO7ZZKK2U · pith_short_8: WSYSZYAM

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/WSYSZYAMO7ZZKK2UTLCHEUSH4H \
  | 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: b4b12ce00c77f3952b549ac4725247e1ed9aab187304d8498178dc49f56baa86

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c090bee8ba17f615276874a880cc297c6dd573a8116e2b957f4eb789e1458950",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2018-02-26T19:47:19Z",
    "title_canon_sha256": "13256caba76c68f1f8739fb66769cf36b99fba9882e198367b2b7a6290fb2425"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09570",
    "kind": "arxiv",
    "version": 1
  }
}