Pith Number

pith:SPAOM7ZB

pith:2012:SPAOM7ZB6IQR626JPWM2SIAJEL

not attested not anchored not stored refs pending

Gradient-based stopping rules for maximum-likelihood quantum-state tomography

Emanuel Knill, Mark Girard, Scott Glancy

arxiv:1205.4043 v2 · 2012-05-17 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPAOM7ZB6IQR626JPWM2SIAJEL}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:42:23.753543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93c0e67f21f2211f6bc97d99a9200922e1e781495a78a856cec0b00b8f00c906

Aliases

arxiv: 1205.4043 · arxiv_version: 1205.4043v2 · doi: 10.48550/arxiv.1205.4043 · pith_short_12: SPAOM7ZB6IQR · pith_short_16: SPAOM7ZB6IQR626J · pith_short_8: SPAOM7ZB

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/SPAOM7ZB6IQR626JPWM2SIAJEL \
  | 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: 93c0e67f21f2211f6bc97d99a9200922e1e781495a78a856cec0b00b8f00c906

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbe3a9a57f9805e47643e1ae5335256fd90fce0be892c51e2f13801d9f91bf58",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-05-17T20:56:02Z",
    "title_canon_sha256": "42e86fb4691ef2798b3e0a81cb2b7b82595cb51f3f8b838e636414e8df43d37c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4043",
    "kind": "arxiv",
    "version": 2
  }
}