Pith Number

pith:DHHZDD4N

pith:2019:DHHZDD4NOKTS6ZV7BNLKC7GRGA

not attested not anchored not stored refs pending

A finite element method for Dirichlet boundary control of elliptic partial differential equations

Shaohong Du, Zhiqiang Cai

arxiv:1904.09783 v1 · 2019-04-22 · 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{DHHZDD4NOKTS6ZV7BNLKC7GRGA}

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	2026-05-17T23:48:03.344586Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19cf918f8d72a72f66bf0b56a17cd1302ce3201c79e710334a25516b15d15499

Aliases

arxiv: 1904.09783 · arxiv_version: 1904.09783v1 · doi: 10.48550/arxiv.1904.09783 · pith_short_12: DHHZDD4NOKTS · pith_short_16: DHHZDD4NOKTS6ZV7 · pith_short_8: DHHZDD4N

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/DHHZDD4NOKTS6ZV7BNLKC7GRGA \
  | 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: 19cf918f8d72a72f66bf0b56a17cd1302ce3201c79e710334a25516b15d15499

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "52d2249f8ab12d580ceb31412fa94bc3788497a6e2fc6bfd8913d1c7ef02ae6b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-22T09:30:48Z",
    "title_canon_sha256": "2723701439120a05cc865be885faec745b201db045843c52e16703b238744889"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09783",
    "kind": "arxiv",
    "version": 1
  }
}