Pith Number

pith:5DSNQDUR

pith:2020:5DSNQDUR4LF5LL7P47UX734JUG

not attested not anchored not stored refs pending

PointContrast: Unsupervised Pre-training for 3D Point Cloud Understanding

Charles R. Qi, Demi Guo, Jiatao Gu, Leonidas J. Guibas, Or Litany, Saining Xie

arxiv:2007.10985 v3 · 2020-07-21 · 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{5DSNQDUR4LF5LL7P47UX734JUG}

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	2026-07-05T01:53:21.387436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8e4d80e91e2cbd5afefe7e97fef89a1af948c6fa93b169a0469a15a5c88298a

Aliases

arxiv: 2007.10985 · arxiv_version: 2007.10985v3 · doi: 10.48550/arxiv.2007.10985 · pith_short_12: 5DSNQDUR4LF5 · pith_short_16: 5DSNQDUR4LF5LL7P · pith_short_8: 5DSNQDUR

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/5DSNQDUR4LF5LL7P47UX734JUG \
  | 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: e8e4d80e91e2cbd5afefe7e97fef89a1af948c6fa93b169a0469a15a5c88298a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9f5e08df54b993855be665a406920f1a132dac66d7f641d2ef20bc1d76ebfe19",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2020-07-21T17:59:22Z",
    "title_canon_sha256": "a38f05a61c45810e6823905dd0111a45de31451f1ec1a1b871ddc4cc814b1047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.10985",
    "kind": "arxiv",
    "version": 3
  }
}