Pith Number

pith:4XNDIRVR

pith:2023:4XNDIRVR6ZGI4IFBJQJR5EXYQV

not attested not anchored not stored refs pending

Hardness and fracture toughness models by symbolic regression

Haiyang Niu, Jiangxu Li, Jiantao Wang, Jinbin Zhao, Junlin Li, Peitao Liu, Xing-Qiu Chen, Yan Sun

arxiv:2305.19991 v2 · 2023-05-31 · cond-mat.mtrl-sci

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4XNDIRVR6ZGI4IFBJQJR5EXYQV}

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	2026-07-05T06:37:33.312600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e5da3446b1f64c8e20a14c131e92f88542ed595f935057688d0bdc85d28aa52b

Aliases

arxiv: 2305.19991 · arxiv_version: 2305.19991v2 · doi: 10.48550/arxiv.2305.19991 · pith_short_12: 4XNDIRVR6ZGI · pith_short_16: 4XNDIRVR6ZGI4IFB · pith_short_8: 4XNDIRVR

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/4XNDIRVR6ZGI4IFBJQJR5EXYQV \
  | 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: e5da3446b1f64c8e20a14c131e92f88542ed595f935057688d0bdc85d28aa52b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99f27da102a3d2d0b5e72edbc03efefcc72584a9794b7c6e6d3f6a15820a90af",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2023-05-31T16:13:02Z",
    "title_canon_sha256": "e9580fe7c06d7a9981f750f7791ab00c6f5f85acefac6df42335ca57a4b9db68"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2305.19991",
    "kind": "arxiv",
    "version": 2
  }
}