Pith Number

pith:I27VGZH6

pith:2014:I27VGZH6YRNU6C2MWON6ZEWP34

not attested not anchored not stored refs pending

Approximation of integral operators by Green quadrature and nested cross approximation

Steffen B\"orm, Sven Christophersen

arxiv:1404.2234 v3 · 2014-04-08 · math.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{I27VGZH6YRNU6C2MWON6ZEWP34}

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	2026-05-18T01:29:21.833057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

46bf5364fec45b4f0b4cb39bec92cfdf178ccb8a8c96bd1cf9a666f33432367c

Aliases

arxiv: 1404.2234 · arxiv_version: 1404.2234v3 · doi: 10.48550/arxiv.1404.2234 · pith_short_12: I27VGZH6YRNU · pith_short_16: I27VGZH6YRNU6C2M · pith_short_8: I27VGZH6

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/I27VGZH6YRNU6C2MWON6ZEWP34 \
  | 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: 46bf5364fec45b4f0b4cb39bec92cfdf178ccb8a8c96bd1cf9a666f33432367c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4d9b400aa245a1b1cb7aadf9f81a70af283710e125d0cfe0530049555e506a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-04-08T17:56:29Z",
    "title_canon_sha256": "4db452445d6f7f12ee8ded90c4df0377ea8db75db9edd6365563e4fcb356d449"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.2234",
    "kind": "arxiv",
    "version": 3
  }
}