Pith Number

pith:2NBSK6L6

pith:2013:2NBSK6L6IJ2ZKV7CUQKBI2XPGI

not attested not anchored not stored refs pending

Spectral approximation on the unit ball

Huiyuan Li, Yuan Xu

arxiv:1310.2283 v2 · 2013-10-08 · math.CA · 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{2NBSK6L6IJ2ZKV7CUQKBI2XPGI}

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	2026-05-18T03:07:42.106191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d34325797e42759557e2a414146aef320db4ffe5a06a86d68fe883bafea1a404

Aliases

arxiv: 1310.2283 · arxiv_version: 1310.2283v2 · doi: 10.48550/arxiv.1310.2283 · pith_short_12: 2NBSK6L6IJ2Z · pith_short_16: 2NBSK6L6IJ2ZKV7C · pith_short_8: 2NBSK6L6

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/2NBSK6L6IJ2ZKV7CUQKBI2XPGI \
  | 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: d34325797e42759557e2a414146aef320db4ffe5a06a86d68fe883bafea1a404

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "13a3b73d08bc6d750b3e6894ba238f5144df11d4b1f9879a0093c21904d05b55",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2013-10-08T21:32:18Z",
    "title_canon_sha256": "ceb72c9222394aad2b0aea27488c15d9ba394da610d5c0638c7b987278123e33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.2283",
    "kind": "arxiv",
    "version": 2
  }
}