Pith Number

pith:SCALKLW3

pith:2012:SCALKLW3EW2PFMUFVALJWO7LUS

not attested not anchored not stored refs pending

Operations on soft sets revisited

Ping Zhu, Qiaoyan Wen

arxiv:1205.2857 v1 · 2012-05-13 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SCALKLW3EW2PFMUFVALJWO7LUS}

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	2026-05-18T02:21:10.389039Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9080b52edb25b4f2b285a8169b3beba4b2771a846c4ffae089d50549dbcafbf6

Aliases

arxiv: 1205.2857 · arxiv_version: 1205.2857v1 · doi: 10.48550/arxiv.1205.2857 · pith_short_12: SCALKLW3EW2P · pith_short_16: SCALKLW3EW2PFMUF · pith_short_8: SCALKLW3

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/SCALKLW3EW2PFMUFVALJWO7LUS \
  | 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: 9080b52edb25b4f2b285a8169b3beba4b2771a846c4ffae089d50549dbcafbf6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4e09802ac2ba8e54179f67aa454bda5ee1d32fa00bce25a9d08b6ddc40497630",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2012-05-13T13:21:59Z",
    "title_canon_sha256": "f15b03997e7e310dd9f6443df0d295aa1ddd0e2c1ddb0543194b29ce272d591f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2857",
    "kind": "arxiv",
    "version": 1
  }
}