Pith Number

pith:USTWHRDW

pith:2015:USTWHRDWUTXBJXUKBDKQOOSJUL

not attested not anchored not stored refs pending

A study of memory effects in a chess database

Ana L. Schaigorodsky, Juan I. Perotti, Orlando V. Billoni

arxiv:1504.06611 v2 · 2015-04-09 · physics.soc-ph · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{USTWHRDWUTXBJXUKBDKQOOSJUL}

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	2026-05-18T00:51:18.647590Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4a763c476a4ee14de8a08d5073a49a2d4f6ea23aa2799707fc66ab7f0c9b8b9

Aliases

arxiv: 1504.06611 · arxiv_version: 1504.06611v2 · doi: 10.48550/arxiv.1504.06611 · pith_short_12: USTWHRDWUTXB · pith_short_16: USTWHRDWUTXBJXUK · pith_short_8: USTWHRDW

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/USTWHRDWUTXBJXUKBDKQOOSJUL \
  | 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: a4a763c476a4ee14de8a08d5073a49a2d4f6ea23aa2799707fc66ab7f0c9b8b9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d25a9b9fc5c5a0d98fb05e396bd7c276e264471012079c653680a449e93356ed",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2015-04-09T14:54:37Z",
    "title_canon_sha256": "16dd0700187a44ee78a46a634ccf31d4547093543ba1aec4a6f88f71898fed1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06611",
    "kind": "arxiv",
    "version": 2
  }
}