Pith Number

pith:JPMGIJLY

pith:2019:JPMGIJLY63GEWCM6TSRAJB7PTL

not attested not anchored not stored refs pending

On the identification of source term in the heat equation from sparse data

William Rundell, Zhidong Zhang

arxiv:1908.02015 v1 · 2019-08-06 · math.AP · cs.NA · 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{JPMGIJLY63GEWCM6TSRAJB7PTL}

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	2026-07-04T23:51:50.150176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4bd8642578f6cc4b099e9ca20487ef9afd35a209e2b42ef22abfb934cfbe358f

Aliases

arxiv: 1908.02015 · arxiv_version: 1908.02015v1 · doi: 10.48550/arxiv.1908.02015 · pith_short_12: JPMGIJLY63GE · pith_short_16: JPMGIJLY63GEWCM6 · pith_short_8: JPMGIJLY

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/JPMGIJLY63GEWCM6TSRAJB7PTL \
  | 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: 4bd8642578f6cc4b099e9ca20487ef9afd35a209e2b42ef22abfb934cfbe358f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c323404fefff42a6778f1ce6f82370c237e8259384376d655232d8689cecc3dc",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-08-06T08:37:29Z",
    "title_canon_sha256": "bd3b1ad2f6fb811488628b3a42a6e45a4ccbfea60b14e95c8848d16893f17eaf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.02015",
    "kind": "arxiv",
    "version": 1
  }
}