Pith Number

pith:F7A3TONS

pith:2015:F7A3TONSJPHWT7OHVEFTFVTRF2

not attested not anchored not stored refs pending

A Reduction from Valued CSP to Min Cost Homomorphism Problem for Digraphs

Andrei Krokhin, Robert Powell

arxiv:1507.01776 v1 · 2015-07-07 · 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{F7A3TONSJPHWT7OHVEFTFVTRF2}

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	2026-05-18T01:37:12.409880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2fc1b9b9b24bcf69fdc7a90b32d6712e8ff46107153c0ca3dc1fbcb982fa5c79

Aliases

arxiv: 1507.01776 · arxiv_version: 1507.01776v1 · doi: 10.48550/arxiv.1507.01776 · pith_short_12: F7A3TONSJPHW · pith_short_16: F7A3TONSJPHWT7OH · pith_short_8: F7A3TONS

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/F7A3TONSJPHWT7OHVEFTFVTRF2 \
  | 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: 2fc1b9b9b24bcf69fdc7a90b32d6712e8ff46107153c0ca3dc1fbcb982fa5c79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a8047464ca5577920b5adea9bd481c6b16721112093c45adedbbea7c0851d8de",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2015-07-07T12:23:23Z",
    "title_canon_sha256": "d347acd6b52d2cea32c15e9ea7f12b2f110356e4eefa58bd580311f498800563"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.01776",
    "kind": "arxiv",
    "version": 1
  }
}