Pith Number

pith:FWEBC32D

pith:2018:FWEBC32DFEXHRHPBZ4EIXXTY2E

not attested not anchored not stored refs pending

A gradient enhanced $\ell_1$-minimization for sparse approximation of polynomial chaos expansions

Akil Narayan, Ling Guo, Tao Zhou

arxiv:1802.08837 v1 · 2018-02-24 · 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{FWEBC32DFEXHRHPBZ4EIXXTY2E}

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	2026-05-18T00:16:25.579693Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d88116f43292e789de1cf088bde78d115c3849e6d6f1f38e6cbf8d9b3001a6b

Aliases

arxiv: 1802.08837 · arxiv_version: 1802.08837v1 · doi: 10.48550/arxiv.1802.08837 · pith_short_12: FWEBC32DFEXH · pith_short_16: FWEBC32DFEXHRHPB · pith_short_8: FWEBC32D

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/FWEBC32DFEXHRHPBZ4EIXXTY2E \
  | 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: 2d88116f43292e789de1cf088bde78d115c3849e6d6f1f38e6cbf8d9b3001a6b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67efb37e1a574a37602f9bea36ff48029022de226eb98124f5d9fdca7e00f688",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-02-24T10:47:54Z",
    "title_canon_sha256": "947647000bbaba41defe1a96dd54b648382478b65cd1b80c39a8f0811b9da17e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.08837",
    "kind": "arxiv",
    "version": 1
  }
}