Pith Number

pith:CWD3MDOX

pith:2017:CWD3MDOXZ5DKKDJ4SHB3FODP27

not attested not anchored not stored refs pending

Spectral Compressed Sensing via Projected Gradient Descent

Jian-Feng Cai, Ke Wei, Tianming Wang

arxiv:1707.09726 v1 · 2017-07-31 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CWD3MDOXZ5DKKDJ4SHB3FODP27}

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	2026-05-18T00:39:08.456524Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1587b60dd7cf46a50d3c91c3b2b86fd7f6e4912935e46e0f63d1b21dfb07cc02

Aliases

arxiv: 1707.09726 · arxiv_version: 1707.09726v1 · doi: 10.48550/arxiv.1707.09726 · pith_short_12: CWD3MDOXZ5DK · pith_short_16: CWD3MDOXZ5DKKDJ4 · pith_short_8: CWD3MDOX

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/CWD3MDOXZ5DKKDJ4SHB3FODP27 \
  | 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: 1587b60dd7cf46a50d3c91c3b2b86fd7f6e4912935e46e0f63d1b21dfb07cc02

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6115ce6e9ad05d095ec3480ed866f3d84237e90e4dd0285fb5236dd2e4a5172e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-07-31T05:39:23Z",
    "title_canon_sha256": "4ad81b8ccaac51cff76510354cb632660c6bbbfee45cee5341e2053f41fae034"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.09726",
    "kind": "arxiv",
    "version": 1
  }
}