Pith Number

pith:H7Q6NJMA

pith:2020:H7Q6NJMAKV7QGYRVC5626HB2IK

not attested not anchored not stored refs pending

On parameter identification problems for elliptic boundary value problems in divergence form, Part I: An abstract framework

Anne Wald, Heiko Hoffmann

arxiv:2002.05009 v1 · 2020-02-12 · 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{H7Q6NJMAKV7QGYRVC5626HB2IK}

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	2026-07-05T00:40:20.524155Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3fe1e6a580557f036235177daf1c3a42b2febd3c10590ea5cce341e6f7ef75ab

Aliases

arxiv: 2002.05009 · arxiv_version: 2002.05009v1 · doi: 10.48550/arxiv.2002.05009 · pith_short_12: H7Q6NJMAKV7Q · pith_short_16: H7Q6NJMAKV7QGYRV · pith_short_8: H7Q6NJMA

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/H7Q6NJMAKV7QGYRVC5626HB2IK \
  | 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: 3fe1e6a580557f036235177daf1c3a42b2febd3c10590ea5cce341e6f7ef75ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf4b29a46f571b681fdb625e04c0d0a20cbc0770d371ba27e8b9c7a710fbc431",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2020-02-12T14:15:49Z",
    "title_canon_sha256": "285f047c8cd7c8799034d6d18d61f2c1dfbb3803b7c3b5f2754663bc14e87d61"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.05009",
    "kind": "arxiv",
    "version": 1
  }
}