Pith Number

pith:3JV6I6KW

pith:2016:3JV6I6KWNMHSOHOFG5RPRMTQSW

not attested not anchored not stored refs pending

Projected gradient descent algorithms for quantum state tomography

Eliot Bolduc, Erik Gauger, George Knee, Jonathan Leach

arxiv:1612.09531 v1 · 2016-12-30 · quant-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{3JV6I6KWNMHSOHOFG5RPRMTQSW}

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	2026-05-18T00:53:41.285016Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da6be479566b0f271dc53762f8b27095bab2752d9f5ec07160cee6ef4c775bf9

Aliases

arxiv: 1612.09531 · arxiv_version: 1612.09531v1 · doi: 10.48550/arxiv.1612.09531 · pith_short_12: 3JV6I6KWNMHS · pith_short_16: 3JV6I6KWNMHSOHOF · pith_short_8: 3JV6I6KW

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/3JV6I6KWNMHSOHOFG5RPRMTQSW \
  | 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: da6be479566b0f271dc53762f8b27095bab2752d9f5ec07160cee6ef4c775bf9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c12b0a03007dc30bdd6e6e0d75a23d551881546d7e9687eed743aff10e33c60",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2016-12-30T16:59:43Z",
    "title_canon_sha256": "bceae4d7c33bcb3e6eef2c40e450e51ed6eb0e0a59d9e141341c9cb95a886532"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1612.09531",
    "kind": "arxiv",
    "version": 1
  }
}