Pith Number

pith:QWGHPW2S

pith:2020:QWGHPW2SGQTV5B3AD7RNQKGSYL

not attested not anchored not stored refs pending

Sparse Signal Recovery from Phaseless Measurements via Hard Thresholding Pursuit

Jian-Feng Cai, Jingzhi Li, Juntao You, Xiliang Lu

arxiv:2005.08777 v3 · 2020-05-18 · 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{QWGHPW2SGQTV5B3AD7RNQKGSYL}

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	2026-07-05T03:22:32.410378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

858c77db5234275e87601fe2d828d2c2ec24b2502c67f8cf7105e610634234e6

Aliases

arxiv: 2005.08777 · arxiv_version: 2005.08777v3 · doi: 10.48550/arxiv.2005.08777 · pith_short_12: QWGHPW2SGQTV · pith_short_16: QWGHPW2SGQTV5B3A · pith_short_8: QWGHPW2S

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/QWGHPW2SGQTV5B3AD7RNQKGSYL \
  | 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: 858c77db5234275e87601fe2d828d2c2ec24b2502c67f8cf7105e610634234e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94c76bfa7d8daa3383cb2a8d04e11db838d35dd8f941c2ed58a00609c3eaebbc",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2020-05-18T14:47:20Z",
    "title_canon_sha256": "38abfeab0020635a50e43ee89b73d689272e16d9062ac0b5ac4c6be36c955957"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.08777",
    "kind": "arxiv",
    "version": 3
  }
}