Pith Number

pith:SU7VRB6Z

pith:2020:SU7VRB6ZRFKQIE22AN3UATEQGR

not attested not anchored not stored refs pending

Sparse Approximate Multifrontal Factorization with Butterfly Compression for High Frequency Wave Equations

Lisa Claus, Pieter Ghysels, Xiaoye Sherry Li, Yang Liu

arxiv:2007.00202 v2 · 2020-07-01 · cs.MS · cs.CE

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SU7VRB6ZRFKQIE22AN3UATEQGR}

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	2026-07-05T03:23:04.758036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

953f5887d9895504135a0377404c903461bf9750d7b9773fcd46800479c9cc2b

Aliases

arxiv: 2007.00202 · arxiv_version: 2007.00202v2 · doi: 10.48550/arxiv.2007.00202 · pith_short_12: SU7VRB6ZRFKQ · pith_short_16: SU7VRB6ZRFKQIE22 · pith_short_8: SU7VRB6Z

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/SU7VRB6ZRFKQIE22AN3UATEQGR \
  | 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: 953f5887d9895504135a0377404c903461bf9750d7b9773fcd46800479c9cc2b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f4705a5d74b02a0b169f016b92b5010472faca007035404fd9ca9850a48ca1f",
    "cross_cats_sorted": [
      "cs.CE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.MS",
    "submitted_at": "2020-07-01T03:27:33Z",
    "title_canon_sha256": "184e39b36bab54d2bd6b9842896353f7347d9c1c20e3a6df4971ad74500585d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.00202",
    "kind": "arxiv",
    "version": 2
  }
}