Pith Number

pith:52Y2LEZG

pith:2021:52Y2LEZGA6AC4CUKIS2V637OS2

not attested not anchored not stored refs pending

Negative Sample Matters: A Renaissance of Metric Learning for Temporal Grounding

Gangshan Wu, Limin Wang, Tao Wu, Tianhao Li, Zhenzhi Wang

arxiv:2109.04872 v2 · 2021-09-10 · cs.CV · cs.MM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{52Y2LEZGA6AC4CUKIS2V637OS2}

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	2026-07-05T03:41:03.931783Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eeb1a5932607802e0a8a44b55f6fee9697461080ffe161337bb20b8d3598558c

Aliases

arxiv: 2109.04872 · arxiv_version: 2109.04872v2 · doi: 10.48550/arxiv.2109.04872 · pith_short_12: 52Y2LEZGA6AC · pith_short_16: 52Y2LEZGA6AC4CUK · pith_short_8: 52Y2LEZG

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/52Y2LEZGA6AC4CUKIS2V637OS2 \
  | 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: eeb1a5932607802e0a8a44b55f6fee9697461080ffe161337bb20b8d3598558c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa87412a9fbf0e64354ed2f42bc7f79321ebd3af95a358c0d212ffc3081deafc",
    "cross_cats_sorted": [
      "cs.MM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-09-10T13:38:54Z",
    "title_canon_sha256": "388b0bc32dc8b3949ee91187d458bd84299d7d8294410acb88f596f7830a83d5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.04872",
    "kind": "arxiv",
    "version": 2
  }
}