Pith Number

pith:ZR27GFAF

pith:2020:ZR27GFAFWB67V2VEWIX7OV4MEQ

not attested not anchored not stored refs pending

Optimizing User Interface Layouts via Gradient Descent

Casimir Wierzynski, Lama Nachman, Peitong Duan

arxiv:2002.10702 v1 · 2020-02-25 · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZR27GFAFWB67V2VEWIX7OV4MEQ}

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	2026-07-05T00:43:24.307989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc75f31405b07dfaeaa4b22ff7578c2426b47794cf4f8118001ac4fb63f0cfc9

Aliases

arxiv: 2002.10702 · arxiv_version: 2002.10702v1 · doi: 10.48550/arxiv.2002.10702 · pith_short_12: ZR27GFAFWB67 · pith_short_16: ZR27GFAFWB67V2VE · pith_short_8: ZR27GFAF

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/ZR27GFAFWB67V2VEWIX7OV4MEQ \
  | 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: cc75f31405b07dfaeaa4b22ff7578c2426b47794cf4f8118001ac4fb63f0cfc9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c25ca9499cea4a5833e32c15aff0e5d0c7e954d3be63289b0854cd221d3535d9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2020-02-25T07:17:27Z",
    "title_canon_sha256": "360f4809ba921576e84bdde870adb1ad9f9a66b7f5e516865ded8416896d5d58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.10702",
    "kind": "arxiv",
    "version": 1
  }
}