Pith Number

pith:U57SQJ7N

pith:2018:U57SQJ7NBHU53EY2Q2GQHRPS3U

not attested not anchored not stored refs pending

A mixed $\ell_1$ regularization approach for sparse simultaneous approximation of parameterized PDEs

Clayton Webster, Hoang Tran, Nick Dexter

arxiv:1812.06174 v1 · 2018-12-14 · 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{U57SQJ7NBHU53EY2Q2GQHRPS3U}

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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	2026-06-04T20:13:48.289179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a77f2827ed09e9dd931a868d03c5f2dd152dadcbf038e588b5aec9bfd16a4fc4

Aliases

arxiv: 1812.06174 · arxiv_version: 1812.06174v1 · doi: 10.48550/arxiv.1812.06174 · pith_short_12: U57SQJ7NBHU5 · pith_short_16: U57SQJ7NBHU53EY2 · pith_short_8: U57SQJ7N

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/U57SQJ7NBHU53EY2Q2GQHRPS3U \
  | 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: a77f2827ed09e9dd931a868d03c5f2dd152dadcbf038e588b5aec9bfd16a4fc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d17f2a129fe803d472417de05a9aaedc7d1ed75ab05e50a95265b558f677f63",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-12-14T21:29:56Z",
    "title_canon_sha256": "05df547f94743250bfa6c16e2ccbdbec9fcda659613134679bc0dce0dd771631"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.06174",
    "kind": "arxiv",
    "version": 1
  }
}