Pith Number

pith:WBHGKNMO

pith:2015:WBHGKNMOUBBDP5LLOMT7CMWXIQ

not attested not anchored not stored refs pending

Spectral thresholding quantum tomography for low rank states

Cristina Butucea, Madalin Guta, Theodore Kypraios

arxiv:1504.08295 v1 · 2015-04-30 · quant-ph · math-ph · math.MP · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WBHGKNMOUBBDP5LLOMT7CMWXIQ}

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	2026-05-18T01:25:00.700057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b04e65358ea04237f56b7327f132d7441ae8c9700204ad4bb5aeecfe473689e3

Aliases

arxiv: 1504.08295 · arxiv_version: 1504.08295v1 · doi: 10.48550/arxiv.1504.08295 · pith_short_12: WBHGKNMOUBBD · pith_short_16: WBHGKNMOUBBDP5LL · pith_short_8: WBHGKNMO

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/WBHGKNMOUBBDP5LLOMT7CMWXIQ \
  | 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: b04e65358ea04237f56b7327f132d7441ae8c9700204ad4bb5aeecfe473689e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "77fd3e003ae6ed47d2caa90fa5f2d3b1a154fba6bac1e52348a231317cb4dcd2",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-04-30T16:31:06Z",
    "title_canon_sha256": "aaa93fd2745a12e735970bd6d0c7920a41ada1e2ee9321bff43ebb6c642ed6dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.08295",
    "kind": "arxiv",
    "version": 1
  }
}