Pith Number

pith:N3JSUABV

pith:2019:N3JSUABVGOJCE7CGQIDT66ZOC6

not attested not anchored not stored refs pending

Hindsight Trust Region Policy Optimization

David Hsu, Hanbo Zhang, Nanning Zheng, Site Bai, Xuguang Lan

arxiv:1907.12439 v5 · 2019-07-29 · cs.LG · cs.AI · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N3JSUABVGOJCE7CGQIDT66ZOC6}

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	2026-07-05T02:40:25.494941Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ed32a00353392227c4682073f7b2e17afb7a2bdf38ccb3e0e28949b1eb4cc47

Aliases

arxiv: 1907.12439 · arxiv_version: 1907.12439v5 · doi: 10.48550/arxiv.1907.12439 · pith_short_12: N3JSUABVGOJC · pith_short_16: N3JSUABVGOJCE7CG · pith_short_8: N3JSUABV

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/N3JSUABVGOJCE7CGQIDT66ZOC6 \
  | 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: 6ed32a00353392227c4682073f7b2e17afb7a2bdf38ccb3e0e28949b1eb4cc47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d223c2cd107afd1ba55dcd381dcd779ee6ab2f3714251b6b477ef5df1ab56eb",
    "cross_cats_sorted": [
      "cs.AI",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-07-29T13:59:42Z",
    "title_canon_sha256": "f92f81221d7b3913b56546bd9321073cd77ab5c9bd6d8b5a8361f63c4df9d462"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.12439",
    "kind": "arxiv",
    "version": 5
  }
}