Pith Number

pith:NDMVIBJQ

pith:2011:NDMVIBJQZXCRGLKKFC5YLZ2XNU

not attested not anchored not stored refs pending

Sparse Pseudospectral Approximation Method

Eric T. Phipps, Michael S. Eldred, Paul G. Constantine

arxiv:1109.2936 v2 · 2011-09-13 · 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{NDMVIBJQZXCRGLKKFC5YLZ2XNU}

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	2026-05-18T03:28:54.207658Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68d9540530cdc5132d4a28bb85e7576d1aaf7bd9ac4598d766ee0de78bd73925

Aliases

arxiv: 1109.2936 · arxiv_version: 1109.2936v2 · doi: 10.48550/arxiv.1109.2936 · pith_short_12: NDMVIBJQZXCR · pith_short_16: NDMVIBJQZXCRGLKK · pith_short_8: NDMVIBJQ

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/NDMVIBJQZXCRGLKKFC5YLZ2XNU \
  | 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: 68d9540530cdc5132d4a28bb85e7576d1aaf7bd9ac4598d766ee0de78bd73925

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17399f1573f02c9f374a77a60383221ceba28757277137f446d819be84639a53",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2011-09-13T21:32:45Z",
    "title_canon_sha256": "2010e8b1ca1aad83a0fa6b8e50a9473e958aee9efd4deee9f25ca7dd71129f1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.2936",
    "kind": "arxiv",
    "version": 2
  }
}