Pith Number

pith:5IVRKLI3

pith:2023:5IVRKLI3AW7VMQN3IL2T52OWQP

not attested not anchored not stored refs pending

Model order reduction of an ultraweak and optimally stable variational formulation for parametrized reactive transport problems

Christian Engwer, Lukas Renelt, Mario Ohlberger

arxiv:2310.19674 v2 · 2023-10-30 · 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{5IVRKLI3AW7VMQN3IL2T52OWQP}

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	2026-07-05T08:37:50.078977Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea2b152d1b05bf5641bb42f53ee9d683f2ced2ca2f3761d01ffa1a1148a57c38

Aliases

arxiv: 2310.19674 · arxiv_version: 2310.19674v2 · doi: 10.48550/arxiv.2310.19674 · pith_short_12: 5IVRKLI3AW7V · pith_short_16: 5IVRKLI3AW7VMQN3 · pith_short_8: 5IVRKLI3

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/5IVRKLI3AW7VMQN3IL2T52OWQP \
  | 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: ea2b152d1b05bf5641bb42f53ee9d683f2ced2ca2f3761d01ffa1a1148a57c38

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5a16296f705437abfee364ad2fbf1c06c9eb89b3413dc2f48872de86125ce662",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2023-10-30T15:51:59Z",
    "title_canon_sha256": "de02b605d6b43e3c57da968f14e106f7aa1fd48a9177e8dae52ce959ef5d0c19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2310.19674",
    "kind": "arxiv",
    "version": 2
  }
}