Pith Number

pith:J34CI2EM

pith:2019:J34CI2EMAYQFO4ULBOHG2LDRI4

not attested not anchored not stored refs pending

Structure-preserving discretization for port-Hamiltonian descriptor systems

Riccardo Morandin, Volker Mehrmann

arxiv:1903.10451 v1 · 2019-03-25 · math.OC · math.DS · 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{J34CI2EMAYQFO4ULBOHG2LDRI4}

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	2026-05-17T23:50:29.342147Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ef824688c062057728b0b8e6d2c71472dada79c1df51b71ad668a05a9e5e326

Aliases

arxiv: 1903.10451 · arxiv_version: 1903.10451v1 · doi: 10.48550/arxiv.1903.10451 · pith_short_12: J34CI2EMAYQF · pith_short_16: J34CI2EMAYQFO4UL · pith_short_8: J34CI2EM

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/J34CI2EMAYQFO4ULBOHG2LDRI4 \
  | 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: 4ef824688c062057728b0b8e6d2c71472dada79c1df51b71ad668a05a9e5e326

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82f690da3ba1b104b128cba46524a0c14d6eceab47d865d6c6be3c4cf19c3827",
    "cross_cats_sorted": [
      "math.DS",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-03-25T16:35:50Z",
    "title_canon_sha256": "b1e375bb34bd5c9de10eb886a885e9ab72151d3dba5b4d8c123c479d6ed0483c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.10451",
    "kind": "arxiv",
    "version": 1
  }
}