Pith Number

pith:NNAKNNCK

pith:2022:NNAKNNCK2G2EHG3P6XTICO2WHP

not attested not anchored not stored refs pending

Symbolic Regression is NP-hard

Marco Virgolin, Solon P. Pissis

arxiv:2207.01018 v3 · 2022-07-03 · cs.NE · 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{NNAKNNCK2G2EHG3P6XTICO2WHP}

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.

Cited by

6 papers in Pith

CMBolic: Symbolic emulators for the Cosmic Microwave Background. I. Lensing

FunctionEvolve: Structure-Guided Symbolic Regression with LLMs

Learning dynamical systems with biochemically informed neural ordinary differential equations

Neuro-Symbolic AI for Analytical Solutions of Differential Equations

Discovery of Nonlinear Dynamics with Automated Basis Function Generation

Receipt and verification

First computed	2026-07-05T04:38:54.297607Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b40a6b44ad1b4439b6ff5e6813b563be503d76726215520396cbd0150e95ece

Aliases

arxiv: 2207.01018 · arxiv_version: 2207.01018v3 · doi: 10.48550/arxiv.2207.01018 · pith_short_12: NNAKNNCK2G2E · pith_short_16: NNAKNNCK2G2EHG3P · pith_short_8: NNAKNNCK

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/NNAKNNCK2G2EHG3P6XTICO2WHP \
  | 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: 6b40a6b44ad1b4439b6ff5e6813b563be503d76726215520396cbd0150e95ece

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0537d6dd6142970996a0b0cbaea335c0c3e29e206ddb2585ffc282607cc8744a",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2022-07-03T12:10:28Z",
    "title_canon_sha256": "49c91705086f27f56741f55add0c7ae366e6c2a4cfae051b96f95c25d8a01a2d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2207.01018",
    "kind": "arxiv",
    "version": 3
  }
}