Pith Number

pith:5GYDGES7

pith:2025:5GYDGES7U7WVMCNXVRJMDN7TO7

not attested not anchored not stored refs pending

Quantitative estimates for a nonlinear inverse source problem in a coupled diffusion equations with uncertain measurements

Chunlong Sun, Wenlong Zhang, Zhidong Zhang

arxiv:2504.19421 v1 · 2025-04-28 · 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{5GYDGES7U7WVMCNXVRJMDN7TO7}

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	2026-07-05T10:54:56.974199Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9b033125fa7ed5609b7ac52c1b7f377d616c4d77fa80968b5198fd2d3f106ac

Aliases

arxiv: 2504.19421 · arxiv_version: 2504.19421v1 · doi: 10.48550/arxiv.2504.19421 · pith_short_12: 5GYDGES7U7WV · pith_short_16: 5GYDGES7U7WVMCNX · pith_short_8: 5GYDGES7

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/5GYDGES7U7WVMCNXVRJMDN7TO7 \
  | 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: e9b033125fa7ed5609b7ac52c1b7f377d616c4d77fa80968b5198fd2d3f106ac

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e7bad81211d05b86ae448f4b965b13bf46a9d57f5f4bf12c62d0f8a4d196e1e",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-04-28T02:13:06Z",
    "title_canon_sha256": "a6927564fa49c5e507ee84564bae6a0d79ac6e55a412b0b0be3751dd71037656"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.19421",
    "kind": "arxiv",
    "version": 1
  }
}