Pith Number

pith:QWGYYPSM

pith:2026:QWGYYPSMQJZRWJQDFBLD5CUDLH

not attested not anchored not stored refs pending

Physics-Informed Neural Network for Diffusion-Reaction Problems with Dead-Core Formation in Catalyst Slabs

Jan Valdman, Kaisar Tangirbergen, Piotr Skrzypacz

arxiv:2606.02599 v1 · 2026-05-23 · math.NA · cs.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{QWGYYPSMQJZRWJQDFBLD5CUDLH}

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	2026-06-03T00:05:04.216649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858d8c3e4c82731b260328563e8a8359dd63779d5034a5ee800a51b9c6b5d130

Aliases

arxiv: 2606.02599 · arxiv_version: 2606.02599v1 · doi: 10.48550/arxiv.2606.02599 · pith_short_12: QWGYYPSMQJZR · pith_short_16: QWGYYPSMQJZRWJQD · pith_short_8: QWGYYPSM

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/QWGYYPSMQJZRWJQDFBLD5CUDLH \
  | 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: 858d8c3e4c82731b260328563e8a8359dd63779d5034a5ee800a51b9c6b5d130

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcb710b1304a4fa34759193ca52f1b485b6ced9271b9056ad98d81f7093a291d",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-23T05:39:46Z",
    "title_canon_sha256": "1e5ab9393ad56d84da39f0eb3a226c6b277447c687d6a62f068be6422e796dad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02599",
    "kind": "arxiv",
    "version": 1
  }
}