Pith Number

pith:LFNTKZIU

pith:2019:LFNTKZIUND3LWM6BETW3ZMAPSB

not attested not anchored not stored refs pending

The tangential cone condition for some coefficient identification model problems in parabolic PDEs

Barbara Kaltenbacher, Otmar Scherzer, Tram Thi Ngoc Nguyen

arxiv:1908.01239 v2 · 2019-08-03 · math.AP · cs.NA · math.DS · math.NA · math.OC

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LFNTKZIUND3LWM6BETW3ZMAPSB}

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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	2026-07-05T03:03:23.981767Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

595b35651468f6bb33c124edbcb00f904e72f8b79c86be7fba9154a0131df79d

Aliases

arxiv: 1908.01239 · arxiv_version: 1908.01239v2 · doi: 10.48550/arxiv.1908.01239 · pith_short_12: LFNTKZIUND3L · pith_short_16: LFNTKZIUND3LWM6B · pith_short_8: LFNTKZIU

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/LFNTKZIUND3LWM6BETW3ZMAPSB \
  | 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: 595b35651468f6bb33c124edbcb00f904e72f8b79c86be7fba9154a0131df79d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9b6c22808d6efc54585310195fb7538d8ddb10db345c647711cd4ec189575c83",
    "cross_cats_sorted": [
      "cs.NA",
      "math.DS",
      "math.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2019-08-03T22:18:33Z",
    "title_canon_sha256": "5c822f302e80d1decaa3ccb26f7a4a351fd2800f1fc6d012701e88e2b7a26e67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01239",
    "kind": "arxiv",
    "version": 2
  }
}