Pith Number

pith:NTWQ44EO

pith:2013:NTWQ44EOEISZCY5JO5BHS2UCOX

not attested not anchored not stored refs pending

Are the Snapshot Difference Quotients Needed in the Proper Orthogonal Decomposition?

Traian Iliescu, Zhu Wang

arxiv:1303.6012 v3 · 2013-03-25 · 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{NTWQ44EOEISZCY5JO5BHS2UCOX}

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	2026-05-18T03:20:47.892562Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ced0e708e22259163a97742796a8275d944b2c551d8ca29f054763f2de6faf0

Aliases

arxiv: 1303.6012 · arxiv_version: 1303.6012v3 · doi: 10.48550/arxiv.1303.6012 · pith_short_12: NTWQ44EOEISZ · pith_short_16: NTWQ44EOEISZCY5J · pith_short_8: NTWQ44EO

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/NTWQ44EOEISZCY5JO5BHS2UCOX \
  | 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: 6ced0e708e22259163a97742796a8275d944b2c551d8ca29f054763f2de6faf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48ea0c7e78a68d2f46a0efcd808ebe2cb57bb045b0fe2e6f666e1e9945756b86",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2013-03-25T01:19:19Z",
    "title_canon_sha256": "86d82b501dbee716c92163c689f872047c26ed13056c7e7dd8847910ca1a223b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.6012",
    "kind": "arxiv",
    "version": 3
  }
}