Pith Number

pith:R5WF4YP4

pith:2016:R5WF4YP427ZHYC3AOPWBKA6MGZ

not attested not anchored not stored refs pending

Computing ultra-precise eigenvalues of the Laplacian within polygons

Robert Jones

arxiv:1602.08636 v1 · 2016-02-27 · 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{R5WF4YP427ZHYC3AOPWBKA6MGZ}

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	2026-05-18T01:19:52.334821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f6c5e61fcd7f27c0b6073ec1503cc3641ced303197ddf3e95b9162929c0ad53

Aliases

arxiv: 1602.08636 · arxiv_version: 1602.08636v1 · doi: 10.48550/arxiv.1602.08636 · pith_short_12: R5WF4YP427ZH · pith_short_16: R5WF4YP427ZHYC3A · pith_short_8: R5WF4YP4

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/R5WF4YP427ZHYC3AOPWBKA6MGZ \
  | 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: 8f6c5e61fcd7f27c0b6073ec1503cc3641ced303197ddf3e95b9162929c0ad53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0cc030a9c9a0134f183b38136473c153c0780fb64d131934511219d7dc98a749",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2016-02-27T19:53:52Z",
    "title_canon_sha256": "57b218c38f27dcb7dfeebbe3da0348a424465d58461d5ab14401d85faf8ab9f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.08636",
    "kind": "arxiv",
    "version": 1
  }
}