Pith Number

pith:B6FFS6I3

pith:2017:B6FFS6I3MFQGOKDQTOCJIFIGZ2

not attested not anchored not stored refs pending

Spline functions, the discrete biharmonic operator and approximate eigenvalues

Guy Katriel, Matania Ben-Artzi

arxiv:1702.08179 v2 · 2017-02-27 · 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{B6FFS6I3MFQGOKDQTOCJIFIGZ2}

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	2026-06-04T18:10:31.747795Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f8a59791b61606728709b84941506cea20cdd4294995f07372ffc426464cb41

Aliases

arxiv: 1702.08179 · arxiv_version: 1702.08179v2 · doi: 10.48550/arxiv.1702.08179 · pith_short_12: B6FFS6I3MFQG · pith_short_16: B6FFS6I3MFQGOKDQ · pith_short_8: B6FFS6I3

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/B6FFS6I3MFQGOKDQTOCJIFIGZ2 \
  | 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: 0f8a59791b61606728709b84941506cea20cdd4294995f07372ffc426464cb41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24ee3e10db80dcde0944cc94948fc3b2e19eca8897d374694307f017709a773e",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-02-27T08:15:49Z",
    "title_canon_sha256": "a5a8b277c1c62bd288a822ebd845d7c68f4784bc84e340f6aa5eb280724fe61b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.08179",
    "kind": "arxiv",
    "version": 2
  }
}