Pith Number

pith:QBRICDPE

pith:2026:QBRICDPETYMQARRCBYHQA33OW5

not attested not anchored not stored refs pending

R3MG-C: a high-order algebraic-geometric multilevel preconditioner for continuous finite element discretizations

Davide Polverino, Luca Heltai, Marco Feder

arxiv:2607.28235 v1 · 2026-07-30 · 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{QBRICDPETYMQARRCBYHQA33OW5}

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	2026-07-31T01:36:53.133820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

8062810de49e190046220e0f006f6eb76308c5337865caf4a63448c1bbaaabdf

Aliases

arxiv: 2607.28235 · arxiv_version: 2607.28235v1 · doi: 10.48550/arxiv.2607.28235 · pith_short_12: QBRICDPETYMQ · pith_short_16: QBRICDPETYMQARRC · pith_short_8: QBRICDPE

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/QBRICDPETYMQARRCBYHQA33OW5 \
  | 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: 8062810de49e190046220e0f006f6eb76308c5337865caf4a63448c1bbaaabdf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5653e0e649b2ec49d87f433ccea03f20ce64ebed545df3c426e067fdd1ec51c7",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-07-30T14:04:03Z",
    "title_canon_sha256": "b20aca3cdb09cf70a2de707dfc408fa71c8a6b4efbcd02a2908379a14845b9d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.28235",
    "kind": "arxiv",
    "version": 1
  }
}