Pith Number

pith:PBPN742I

pith:2018:PBPN742I4QFBEA43N4X4OQBMVF

not attested not anchored not stored refs pending

Numerical methods for Porous Medium Equation by an Energetic Variational Approach

Chenghua Duan, Cheng Wang, Chun Liu, Xingye Yue

arxiv:1806.10775 v2 · 2018-06-28 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PBPN742I4QFBEA43N4X4OQBMVF}

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	2026-05-17T23:50:27.704924Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

785edff348e40a12039b6f2fc7402ca9533c1fbfc8c26c0ecebca2f4acbc2ff2

Aliases

arxiv: 1806.10775 · arxiv_version: 1806.10775v2 · doi: 10.48550/arxiv.1806.10775 · pith_short_12: PBPN742I4QFB · pith_short_16: PBPN742I4QFBEA43 · pith_short_8: PBPN742I

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/PBPN742I4QFBEA43N4X4OQBMVF \
  | 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: 785edff348e40a12039b6f2fc7402ca9533c1fbfc8c26c0ecebca2f4acbc2ff2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2563860839d2b7ea3853beb1d541338372a92a4a19a68d2dfeee167ac9aa5211",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-06-28T05:31:36Z",
    "title_canon_sha256": "ec99416cba0e2d8ffc97ef6f474f2a01d59b4ce8e1d3b112a067aa781663161d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.10775",
    "kind": "arxiv",
    "version": 2
  }
}