Pith Number

pith:HFNP2UAG

pith:2015:HFNP2UAGHGTHEIX3U3P7A2OFAH

not attested not anchored not stored refs pending

Structured Sparsity: Discrete and Convex approaches

Anastasios Kyrillidis, Luca Baldassarre, Marwa El-Halabi, Quoc Tran-Dinh, Volkan Cevher

arxiv:1507.05367 v1 · 2015-07-20 · cs.IT · math.IT · math.OC · stat.ML

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HFNP2UAGHGTHEIX3U3P7A2OFAH}

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	2026-05-18T01:36:37.008241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

395afd500639a67222fba6dff069c501e6c4d0df8b6f986b8d5a6bbf0605cddd

Aliases

arxiv: 1507.05367 · arxiv_version: 1507.05367v1 · doi: 10.48550/arxiv.1507.05367 · pith_short_12: HFNP2UAGHGTH · pith_short_16: HFNP2UAGHGTHEIX3 · pith_short_8: HFNP2UAG

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/HFNP2UAGHGTHEIX3U3P7A2OFAH \
  | 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: 395afd500639a67222fba6dff069c501e6c4d0df8b6f986b8d5a6bbf0605cddd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b05b9a23b2665f55aee086f072e52440c07e9deb073bc0be1e6ad08c7c3c155d",
    "cross_cats_sorted": [
      "math.IT",
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-07-20T02:19:27Z",
    "title_canon_sha256": "9c7b098cf0b36f13a5dfefa6e714688152c8c18763b612312a9e4495669fa132"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05367",
    "kind": "arxiv",
    "version": 1
  }
}