Pith Number

pith:OX2WZ5L3

pith:2019:OX2WZ5L37IOL7NYF7WKU3ABZ3J

not attested not anchored not stored refs pending

Unsupervised Embedding Learning via Invariant and Spreading Instance Feature

Mang Ye, Pong C. Yuen, Shih-Fu Chang, Xu Zhang

arxiv:1904.03436 v1 · 2019-04-06 · cs.CV

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

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	2026-05-17T23:49:13.405906Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75f56cf57bfa1cbfb705fd954d8039da5adb6558cb83659b768dc51f84762594

Aliases

arxiv: 1904.03436 · arxiv_version: 1904.03436v1 · doi: 10.48550/arxiv.1904.03436 · pith_short_12: OX2WZ5L37IOL · pith_short_16: OX2WZ5L37IOL7NYF · pith_short_8: OX2WZ5L3

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/OX2WZ5L37IOL7NYF7WKU3ABZ3J \
  | 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: 75f56cf57bfa1cbfb705fd954d8039da5adb6558cb83659b768dc51f84762594

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "16d1864c9488f3370063b3a3e980a362660fbb5048f302b6a86b4868f0129c6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-06T12:58:16Z",
    "title_canon_sha256": "40f891109e995d4f2ff7ee7f51f0be408e28b4d153e769c8fe2affbd85e16d9f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.03436",
    "kind": "arxiv",
    "version": 1
  }
}