Pith Number

pith:5QLD4P4I

pith:1998:5QLD4P4I2RDPPKMRGXIPR5ESOB

not attested not anchored not stored refs pending

Projective plane and planar quantum codes

David A. Meyer, Michael H. Freedman

arxiv:quant-ph/9810055 v1 · 1998-10-18 · 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{5QLD4P4I2RDPPKMRGXIPR5ESOB}

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.

Cited by

1 paper in Pith

Fault-Tolerant QLDPC Syndrome Measurement via LDGM Encoding

Receipt and verification

First computed	2026-07-04T14:47:21.865636Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec163e3f88d446f7a99135d0f8f49270554bd65c271b06d427a863bb4178bb47

Aliases

arxiv: quant-ph/9810055 · arxiv_version: quant-ph/9810055v1 · doi: 10.48550/arxiv.quant-ph/9810055 · pith_short_12: 5QLD4P4I2RDP · pith_short_16: 5QLD4P4I2RDPPKMR · pith_short_8: 5QLD4P4I

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/5QLD4P4I2RDPPKMRGXIPR5ESOB \
  | 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: ec163e3f88d446f7a99135d0f8f49270554bd65c271b06d427a863bb4178bb47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b138be060b0ce37b1610b1a0d93b4ad8854de7f764e3b88e953023b0d7f0122a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1998-10-18T04:30:35Z",
    "title_canon_sha256": "58cc674a8087e08814f43912fee2cbefc4c07aa093457a4a9e92d696efbce67b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9810055",
    "kind": "arxiv",
    "version": 1
  }
}