Pith Number

pith:EUV6WFBX

pith:2021:EUV6WFBXNCG7QDVO7BGNBKQHIL

not attested not anchored not stored refs pending

A data-driven model reduction method for parabolic inverse source problems and its convergence analysis

Wenlong Zhang, Zhiwen Zhang, Zhongjian Wang

arxiv:2110.07676 v1 · 2021-10-14 · 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{EUV6WFBXNCG7QDVO7BGNBKQHIL}

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	2026-07-05T03:22:48.661877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

252beb1437688df80eaef84cd0aa0742f089f40c7123430d17904cc8df5e58c0

Aliases

arxiv: 2110.07676 · arxiv_version: 2110.07676v1 · doi: 10.48550/arxiv.2110.07676 · pith_short_12: EUV6WFBXNCG7 · pith_short_16: EUV6WFBXNCG7QDVO · pith_short_8: EUV6WFBX

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/EUV6WFBXNCG7QDVO7BGNBKQHIL \
  | 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: 252beb1437688df80eaef84cd0aa0742f089f40c7123430d17904cc8df5e58c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bfacc3fdd5c1584b7128003421ce95bac27232ac4c04cdb78e4d9575ea9563a",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-10-14T19:18:09Z",
    "title_canon_sha256": "8fa6cfb1047080f29aacd7bd16f3305b59d9a60a973da30faceb1cc520a69d86"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.07676",
    "kind": "arxiv",
    "version": 1
  }
}