Pith Number

pith:NP3SH45Y

pith:2014:NP3SH45YAC64ZYCLPQR2TBZ4RX

not attested not anchored not stored refs pending

Optimal preconditioners for Nitsche-XFEM discretizations of interface problems

Arnold Reusken, Christoph Lehrenfeld

arxiv:1408.2940 v1 · 2014-08-13 · 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{NP3SH45YAC64ZYCLPQR2TBZ4RX}

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	2026-05-18T02:45:20.917947Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bf723f3b800bdcce04b7c23a9873c8ddd73d12bb340505291e16fe519822b66

Aliases

arxiv: 1408.2940 · arxiv_version: 1408.2940v1 · doi: 10.48550/arxiv.1408.2940 · pith_short_12: NP3SH45YAC64 · pith_short_16: NP3SH45YAC64ZYCL · pith_short_8: NP3SH45Y

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/NP3SH45YAC64ZYCLPQR2TBZ4RX \
  | 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: 6bf723f3b800bdcce04b7c23a9873c8ddd73d12bb340505291e16fe519822b66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e89899f2e6d6e6bfe831f0ba428d2f3bfa822ebb3e345b6ae2c7831f5d96cabe",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-08-13T08:35:27Z",
    "title_canon_sha256": "03cb6d044bd11ad2d6bdc0954d55954afeb23f20fcc6011268c8f67323befa4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2940",
    "kind": "arxiv",
    "version": 1
  }
}