Pith Number

pith:SMXLILV5

pith:2015:SMXLILV53XBV5O5RGHSXFCLJAR

not attested not anchored not stored refs pending

The inverse fast multipole method: using a fast approximate direct solver as a preconditioner for dense linear systems

Eric Darve, Hadi Pouransari, Pieter Coulier

arxiv:1508.01835 v2 · 2015-08-07 · 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{SMXLILV53XBV5O5RGHSXFCLJAR}

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	2026-05-18T01:21:19.481687Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

932eb42ebdddc35ebbb131e572896904586c74180b2b5cf782969747563372c0

Aliases

arxiv: 1508.01835 · arxiv_version: 1508.01835v2 · doi: 10.48550/arxiv.1508.01835 · pith_short_12: SMXLILV53XBV · pith_short_16: SMXLILV53XBV5O5R · pith_short_8: SMXLILV5

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/SMXLILV53XBV5O5RGHSXFCLJAR \
  | 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: 932eb42ebdddc35ebbb131e572896904586c74180b2b5cf782969747563372c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f43be9b82c0dfd65b01f87f4515f627587cdb20c3622683daffaa08a7f453bd3",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-08-07T23:22:43Z",
    "title_canon_sha256": "c17aac2fa751d8bcb2770b621a145e114b1894d1558057d9050d4e41f66678fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.01835",
    "kind": "arxiv",
    "version": 2
  }
}