Pith Number

pith:XV7T3CNR

pith:2018:XV7T3CNRNWNYRNJRF3LVGYQKNL

not attested not anchored not stored refs pending

QRkit: Sparse, Composable QR Decompositions for Efficient and Stable Solutions to Problems in Computer Vision

Andrew Fitzgibbon, Jan Svoboda, Thomas Cashman

arxiv:1802.03773 v1 · 2018-02-11 · cs.NA · cs.MS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XV7T3CNRNWNYRNJRF3LVGYQKNL}

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	2026-05-18T00:23:50.458508Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bd7f3d89b16d9b88b5312ed753620a6adb9b5daaa088bbe8484e24eb158a66ae

Aliases

arxiv: 1802.03773 · arxiv_version: 1802.03773v1 · doi: 10.48550/arxiv.1802.03773 · pith_short_12: XV7T3CNRNWNY · pith_short_16: XV7T3CNRNWNYRNJR · pith_short_8: XV7T3CNR

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/XV7T3CNRNWNYRNJRF3LVGYQKNL \
  | 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: bd7f3d89b16d9b88b5312ed753620a6adb9b5daaa088bbe8484e24eb158a66ae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4bd48cea6166a30e39b3b02826720409fcdccfe1cb0d922e3e86de858dcd4fe3",
    "cross_cats_sorted": [
      "cs.MS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2018-02-11T17:18:18Z",
    "title_canon_sha256": "fca4b117a00b29b948a4fcfa92a4ff518c6270fbbe74c9858e41f0c26edbe10d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03773",
    "kind": "arxiv",
    "version": 1
  }
}