Pith Number

pith:YKRPVDQP

pith:2015:YKRPVDQPVRDJ6PDDFNON4L32XR

not attested not anchored not stored refs pending

Necessary conditions for tractability of valued CSPs

Johan Thapper, Stanislav Zivny

arxiv:1502.03482 v2 · 2015-02-11 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YKRPVDQPVRDJ6PDDFNON4L32XR}

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	2026-05-18T01:23:58.608534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2a2fa8e0fac469f3c632b5cde2f7abc7d631fab772d7a51d922483481444ad3

Aliases

arxiv: 1502.03482 · arxiv_version: 1502.03482v2 · doi: 10.48550/arxiv.1502.03482 · pith_short_12: YKRPVDQPVRDJ · pith_short_16: YKRPVDQPVRDJ6PDD · pith_short_8: YKRPVDQP

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/YKRPVDQPVRDJ6PDDFNON4L32XR \
  | 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: c2a2fa8e0fac469f3c632b5cde2f7abc7d631fab772d7a51d922483481444ad3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dffd51696a25b9e79b3063447be285674c308532904ebe536b9e72e647e32b4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-02-11T23:11:42Z",
    "title_canon_sha256": "1a94f6b8cc031ae7df3ba4338c14f8792ad3ff0f0898503e1a2b06cef8b884b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03482",
    "kind": "arxiv",
    "version": 2
  }
}