Pith Number

pith:MQRHKPPS

pith:2025:MQRHKPPSYBU5I26TPJCBEIVQPA

not attested not anchored not stored refs pending

Nodal AMG Coarsening and Interpolation for PDE Systems

Jacob Schroder, James Brannick, Karsten Kahl, Robert Falgout, Taoli Shen

arxiv:2501.16248 v1 · 2025-01-27 · 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{MQRHKPPSYBU5I26TPJCBEIVQPA}

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	2026-07-05T10:05:57.421425Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6422753df2c069d46bd37a441222b0780c2d5db1d685e236761960ef996ed54d

Aliases

arxiv: 2501.16248 · arxiv_version: 2501.16248v1 · doi: 10.48550/arxiv.2501.16248 · pith_short_12: MQRHKPPSYBU5 · pith_short_16: MQRHKPPSYBU5I26T · pith_short_8: MQRHKPPS

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/MQRHKPPSYBU5I26TPJCBEIVQPA \
  | 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: 6422753df2c069d46bd37a441222b0780c2d5db1d685e236761960ef996ed54d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca6863c6c672c587dd98d38b52ac68266a5322bb7f76681b14a5652a98a3f4ec",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2025-01-27T17:49:44Z",
    "title_canon_sha256": "92562ef1bc5d411580e90fdeead5101b2a645aa4c703853f5c4f2e47522354f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.16248",
    "kind": "arxiv",
    "version": 1
  }
}