Pith Number

pith:5EFOLB4S

pith:2018:5EFOLB4SQLU5TSP7TMXZGHJS2B

not attested not anchored not stored refs pending

Efficient online quantum state estimation using a matrix-exponentiated gradient method

Akram Youssry, Christopher Ferrie, Marco Tomamichel

arxiv:1807.01852 v2 · 2018-07-05 · 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{5EFOLB4SQLU5TSP7TMXZGHJS2B}

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	2026-05-17T23:50:07.179335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e90ae5879282e9d9c9ff9b2f931d32d0447e6d6b080c656c46e0beb639e65f0b

Aliases

arxiv: 1807.01852 · arxiv_version: 1807.01852v2 · doi: 10.48550/arxiv.1807.01852 · pith_short_12: 5EFOLB4SQLU5 · pith_short_16: 5EFOLB4SQLU5TSP7 · pith_short_8: 5EFOLB4S

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/5EFOLB4SQLU5TSP7TMXZGHJS2B \
  | 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: e90ae5879282e9d9c9ff9b2f931d32d0447e6d6b080c656c46e0beb639e65f0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0e1685393bfce632b932c2a4a20e13ee1d0ad6f0d83e2c0e752b7b695f807ae",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-07-05T05:53:21Z",
    "title_canon_sha256": "8de88422a64e2c9654a702c8af966f32e0c7776059aba419ae963a687631481b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.01852",
    "kind": "arxiv",
    "version": 2
  }
}