Pith Number

pith:OBEQ53ZY

pith:2019:OBEQ53ZYNUDFREEQDM7VCJKWWB

not attested not anchored not stored refs pending

A Distributed Hierarchical SGD Algorithm with Sparse Global Reduction

Fan Zhou, Guojing Cong

arxiv:1903.05133 v2 · 2019-03-12 · cs.LG · cs.DC · math.OC · 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{OBEQ53ZYNUDFREEQDM7VCJKWWB}

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	2026-07-05T00:02:57.440002Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70490eef386d065890901b3f512556b057eac2d10a8b0d661fc31e44e9774b37

Aliases

arxiv: 1903.05133 · arxiv_version: 1903.05133v2 · doi: 10.48550/arxiv.1903.05133 · pith_short_12: OBEQ53ZYNUDF · pith_short_16: OBEQ53ZYNUDFREEQ · pith_short_8: OBEQ53ZY

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/OBEQ53ZYNUDFREEQDM7VCJKWWB \
  | 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: 70490eef386d065890901b3f512556b057eac2d10a8b0d661fc31e44e9774b37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e435099397fca1f5a6cd153b08576e67182a0136008f87a4c1a88af54077916",
    "cross_cats_sorted": [
      "cs.DC",
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-03-12T18:34:49Z",
    "title_canon_sha256": "baa261d3a5b3b2482a91aa0db0ebb2fc7fe42e1cefd92dd1b8d802a7b372a063"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05133",
    "kind": "arxiv",
    "version": 2
  }
}