Pith Number

pith:ZC6ROXZE

pith:2021:ZC6ROXZET3MJJHAZ4FEL6J2GFV

not attested not anchored not stored refs pending

Learning Optical Flow from a Few Matches

Hongdong Li, Richard Hartley, Shihao Jiang, Yao Lu

arxiv:2104.02166 v1 · 2021-04-05 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZC6ROXZET3MJJHAZ4FEL6J2GFV}

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	2026-07-05T02:29:15.259449Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8bd175f249ed8949c19e148bf27462d5e4561bd9429b7b097ea50aaeba0369c

Aliases

arxiv: 2104.02166 · arxiv_version: 2104.02166v1 · doi: 10.48550/arxiv.2104.02166 · pith_short_12: ZC6ROXZET3MJ · pith_short_16: ZC6ROXZET3MJJHAZ · pith_short_8: ZC6ROXZE

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/ZC6ROXZET3MJJHAZ4FEL6J2GFV \
  | 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: c8bd175f249ed8949c19e148bf27462d5e4561bd9429b7b097ea50aaeba0369c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bd1e4fb7a01fb6bfe3b6994f3e941796ccdb7566b10aff15590422ff540d7cf9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-04-05T21:44:00Z",
    "title_canon_sha256": "6bb5bbd35aba81c9f4507b0a1c877d3fc067a3fb4298f71c6589567e948ba06c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.02166",
    "kind": "arxiv",
    "version": 1
  }
}