Pith Number

pith:RCINTKBJ

pith:2014:RCINTKBJ3PB2X27FATL55ARDNK

not attested not anchored not stored refs pending

Density matrix minimization with $\ell_1$ regularization

Jianfeng Lu, Rongjie Lai, Stanley Osher

arxiv:1403.1525 v1 · 2014-03-06 · math-ph · math.MP · math.NA · physics.comp-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RCINTKBJ3PB2X27FATL55ARDNK}

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	2026-05-18T02:56:51.368764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8890d9a829dbc3abebe504d7de82236a90a8cb9f3d3e8d3b01b4cfc4072be03a

Aliases

arxiv: 1403.1525 · arxiv_version: 1403.1525v1 · doi: 10.48550/arxiv.1403.1525 · pith_short_12: RCINTKBJ3PB2 · pith_short_16: RCINTKBJ3PB2X27F · pith_short_8: RCINTKBJ

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/RCINTKBJ3PB2X27FATL55ARDNK \
  | 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: 8890d9a829dbc3abebe504d7de82236a90a8cb9f3d3e8d3b01b4cfc4072be03a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efe22afa5042bd3a3bcdf7e189401071a638cc339c97e3123e2ae919e4454de9",
    "cross_cats_sorted": [
      "math.MP",
      "math.NA",
      "physics.comp-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2014-03-06T18:34:50Z",
    "title_canon_sha256": "c808bea4c1a240a95f0646473c4896848d3f78cca2443405180159cf6518e9f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.1525",
    "kind": "arxiv",
    "version": 1
  }
}