Pith Number

pith:XRMST2KH

pith:2026:XRMST2KHELWD5RZSHZSJTM7CEV

not attested not anchored not stored refs pending

Multigrid Primer: Basic Principles

Rasmus Tamstorf, Stephen F. McCormick

arxiv:2605.17828 v1 · 2026-05-18 · 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{XRMST2KHELWD5RZSHZSJTM7CEV}

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	2026-05-20T00:05:00.444478Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc5929e94722ec3ec7323e6499b3e225528fb29a4af56d88f4a90c5496fbf268

Aliases

arxiv: 2605.17828 · arxiv_version: 2605.17828v1 · doi: 10.48550/arxiv.2605.17828 · pith_short_12: XRMST2KHELWD · pith_short_16: XRMST2KHELWD5RZS · pith_short_8: XRMST2KH

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/XRMST2KHELWD5RZSHZSJTM7CEV \
  | 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: bc5929e94722ec3ec7323e6499b3e225528fb29a4af56d88f4a90c5496fbf268

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f313d1694d7351938c754af20f5e4e1ab38a8f546a324aa216b91829e7b7986",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-18T04:01:56Z",
    "title_canon_sha256": "57d162849e81dff83f1a0c9bcba4f5135e8e8fe3ef91266621c9ddfb2de3fc4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17828",
    "kind": "arxiv",
    "version": 1
  }
}